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1 IAEA-TECDOC-640 Ranking of safety issues for WWER-440 model

2 RANKING OF SAFETY ISSUES FOR WWER-440 MODEL

3 PLEASE BE AWARE THAT ALL OF THE MISSING PAGES IN THIS DOCUMENT WERE ORIGINALLY BLANK

4 RANKING OF SAFETY ISSUES FOR WWER-440 MODEL

5 FOREWORD In response to requests from Member States operating Soviet designed WWER- 440/230 nuclear power plants (NPPs) for assistance through the IAEA's nuclear safety services,

6 In preparing this material EDITORIAL NOTE

7 CONTENTS 1. INTRODUCTION...

8 1. INTRODUCTION

9

10 Due consideration was also given to two aspects specific to WWER-440/230 NPPs. First, these plants were designed according

11 Finally the issue is evaluated based on its potential to cause accidents with unacceptable consequences. The approach used for ranking of issues related to plant operation is in principle the same. Issues affecting management and organization essential procedures,and training are among those ranked in higher categories. The methodology described aimed at providing guidance for the experts to rank safety issues

12 2. OVERVIEW OF SAFETY ISSUES

13 instrumentation and control (including man-machine interface), electric power supply, fire protection, protection against earthquakes and other external hazards, accident analysis,

14 Safety issues related

15 2.2. Cooling

16 Control

17 Failure

18 Safety issues related to this subsection are: Electrical

19

20

21 Accident Analysis 8 Accident Analysis 9 Operating Procedures 2 Training Radiological Consequences (II) Evaluation of Modifications (III) Emergency Operating Procedures (IV)

22 Safety issues related to this subsection are: Systems

23 It has been proven, though, that the rate of embrittlement can be significantly slowed down

24 Primary Circuit Overpressure Protection Protection of primary circuit against overpressure is insured by the pressurizer safety valves. These valves are generally pilot operated valves. But they are not qualified for water or water/steam mixtures. This means that the primary circuit is not well protected during periods when

25 Components

26 Systems 15 Accident Analysis 1 Accident Analysis 8 Operating Procedures 2 Maintenance Dynamic Loads Due to Piping Failures (II) Confinement Analysis (III) Radiological Consequences (II) Emergency Operating Procedures (IV)

27

28 define what should be done at the level of I&C to improve the performance of each safety function (e.g. accident monitoring instrumentation...). Finally, a detailed programme for upgrading systems and equipment is required where the investigations have identified shortcomings. Safety issues related

29 Implementation of Additional Scram Signals. Highest consideration should

30 Remote Shutdown Panel There

31 At the same time, the means to improve separation in the layout between the two trains should be investigated and strict procedures should be implemented to keep doors and ducts between rooms of the two trains closed. Potential consequences on the required cooling and ventilation systems capacity need to be considered. In case of loss of off-site power, the main source of AC power supply is the diesel. Three diesel generators are installed in each unit, two of them are directly connected to the two redundant 6 kv busbars, the third one is on standby and can be connected to any of

32 DC Power Supply

33 In most of the plants, RMGs have shown a poor reliability and have required frequent repairs. They should

34 With respect to fire detection only areas such as transformers, cable corridors and diesels are covered. Other places with high fire risks or with high safety consequences in case of fire, such as the turbine oil tanks, the safety injection pump room, the reactor hall, the service water pump building or even the main control room are generally not equipped with fire detection systems. In all the areas where a fire would have severe consequences for safety due to common mode failure

35 consider appropriate boundary conditions, application of the single failure criterion, assumptions concerning operator action and common mode failures. Accidents not considered so far, including accidents beyond the DBA should be included in the analyses.

36 Management The safe and efficient operation of a nuclear power plant requires that the organizational structure and responsibilities be clearly defined; that management set the example for and expect high performance standards; that objectives and goals be established, monitored,

37 Issues relating to operating procedures covered in this section are: Accident Analysis 6 Operating Procedures Scope of Accident and Transient Analysis (III)

38

39 emergency plans in most cases were based on the most severe accident scenarios, which places considerable constraints on both the on-site and off-site plans. Emergency plans needed

40 3. DESIGN ISSUES 39

41 ISSUE NUMBER: Core

42 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II IN-CORE MONITORING II IN-CORE MONITORING II IN-CORE MONITORING II IN-CORE MONITORING

43 ISSUE NUMBER: Core 2 ISSUE TITLE: Core Design Margin Evaluation RANK

44 ISSUE ITEM n. TITTLE/Descnption ASPECT AREA REFERENCE II CORE DESIGN MARGIN EVALUATION II COKE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II II CORE DESIGN MARGIN EVALUATION CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION II CORE DESIGN MARGIN EVALUATION

45 ISSUE NUMBER: Core

46 CAT. ISSUE ITEM n. TITTLE/Oescnption ASPECT AREA CLASS REFERENCE II FUEL EXAMINATION

47 ISSUE NUMBER: Core 4 ISSUE TITLE: Reloading Procedures

48 CAT. ISSUE ITEM

49 ISSUE NUMBER: Systems

50 CAT. ISSUE ITEM

51 ISSUE NUMBER: Systems

52 CAT. ISSUE ITEM

53 ISSUE NUMBER: Systems 3 ISSUE TITLE: Decay heat removal. Ensuring adequate SG inventory RANK

54 CAT. ISSUE ITEM n. TITTLE/Descnption ASPECT AREA CLASS REFERENCE IV DECAY HEAT REMOVAL - SG INVENTORY IV DECAY HEAT REMOVAL - SG INVENTORY IV DECAY HEAT REMOVAL

55 ISSUE NUMBER: Systems

56 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE [I DECAY HEAT REMOVAL

57 ISSUE NUMBER: Systems 5 ISSUE TITLE: Decay Heat Removal. Service Water System RANK OF ISSUE: III ISSUE CLARIFICATION:

58 CAT ISSUE ITEM

59 ISSUE NUMBER: System 6 ISSUE TITLE: Decay Heat Removal. Component Reliability RANK OF ISSUE: III ISSUE CLARIFICATION: The failure probability of active components needed for decay heat removal purposes shall be small to ensure adequate reliability. The existing systematic recording and evaluation

60 CAT. ISSUE ITEM

61 ISSUE NUMBER: Systems

62 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 111 ECCS - FULL LOCA SPECTRUM CAPABILITY 384 STARTUP OF SPRAY PUMPS D ACCIDENT Ï.6 BOHUHICE 11.9.(2) Check the possibility of earlier connection of the spray pumps to the Diesel to achieve lower confirment peak pressure and reduce activity release. Ill ECCS - FULL LOCA SPECTRUM CAPABILITY 628 SPRAY CAPABILITY 0 SYSTEMS 3.7 KOZLOOUY 8.5.(7) Review spray system design capability and performance after new accident analysis for all LOCA spectrun. Ill ECCS - FULL LOCA SPECTRUM CAPABILITY 689 HYDRO ACCUMULATORS 0 ACCIDENT 3.6 KOZLOOUY 11.2.(1) High pressure hydro accumulators should be installed. lit ECCS - FULL LOCA SPECTRUM CAPABILITY 856 ACCUMULATORS FOR LARGER LOCA 0 ACCIDENT 1.11 NOVOVORONE 12.3.(11) The concerns (high energy tanks in the reactor building, coincident top and bottom core flooding) should

63 ISSUE NUMBER: Systems 8 ISSUE TITLE: ECCS - Redundancy and Physical Separation of Redundant Parts RANK OF ISSUE: IV ISSUE CLARIFICATION:

64 CAT ISSUE ITEM n TITTLE/Descnption ASPECT AREA CLASS REFERENCE IV ECCS - REDUNDANCY AND SEPARATION IV ECCS REDUNDANCY AND SEPARATION 54 SAFETY INJECTION POINTS D SYSTEMS 3 6 DESREV Some stations have modified the emergency injection points The 12 cold leg points are no longer used and injection is in 2 hot legs Injection on hot leg must be demonstrated to be effective. 55 HOT LEG INJECTION REDUNDANCY D SYSTEMS 3.6 DESREV A In plants were safety injection is in 2 hot legs, the reduction of injection poits must be assessed. Of concern is a break in a leg so that all injection from one train is lost to the break, coupled with a single failure in the other train. IV ECCS REDUNDANCY AND SEPARATION IV ECCS

65 CAT. ISSUE ITEM

66 ISSUES NUMBER: Systems

67 CAT. ISSUE ITEM n. TITTlE/Description ASPECT AREA CLASS REFERENCE II ECCS - PRIMARY BREAK ISOLATION OPTIONS 39 PRIMARY LOOP ISOLATION STUDY 0 SYSTEMS 1.11 OESREV

68 ISSUE NUMBER: Systems

69 CAT. ISSUE ITEM

70 ISSUE NUMBER: Systems 11 ISSUE TITLE: Primary Circuit Pressure Relief RANK OF ISSUE: III ISSUE CLARIFICATION: In thé original WWER 440/230 design, safety relief valves are provided on the pressurizer. Thèse valves are not qualified to relieve water and their operational reliability is not proven to be adequate under various operating conditions. RELATED ITEMS: 41, 42, 310, 604, 605, 606, 607, , 794, 1043 JUSTIFICATION OF RANKING: Reactor coolant system integrity strongly depends on the reliable operation of primary relief valves. Unreliability

71 CAT. ISSUE ITEM

72 ISSUE NUMBER: Systems 12 ISSUE TITLE: RANK: Secondary Circuit Pressure Relief II ISSUE CLARIFICATION: In thé original WWER 440/230 design 2 safety relief valves are provided for each steam generator on the secondary side. These valves are not qualified to relieve water and their operability

73 CAT. ISSUE ITEM n. T ITTLE/Description ASPECT AREA CLASS REFERENCE II SECONDARY CIRCUIT PRESSURE RELIEF 602 STEAM RELIEF VALVES 0 SYSTEMS 3.6 KOZLODUY 8.1.(7) Complete planned change of steam generator relief valves. II SECONDARY CIRCUIT PRESSURE RELIEF 603 SEGREGATION OF REDUNDANT LINES 0 SYSTEMS 1.9 KOZLCOUY 8.1.(8) Segregation

74 ISSUE NUMBER: System 13 ISSUE TITLE: Reliable Isolation RANK

75 CAT. ISSUE ITEM

76 ISSUE NUMBER: Systems 14 ISSUE TITLE: RANK OF ISSUE: Ventilation/Cooling Capability III ISSUE CLARIFICATION: I&C, cable

77 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III VENTILATION / COOLING CAPABILITY III VENTILATION / COOLING CAPABILITY III VENTILATION

78 ISSUE NUMBER: Systems

79 CAT. ISSUE ITEM

80 ISSUE NUMBER: Components ISSUE TITLE: Embrittlement. Introduction BACKGROUND INFORMATION:

81 ISSUE NUMBER: Components 1 ISSUE TITLE: Embrittlement. Baseline information and analysis. RANK

82 CAT. ISSUE ITEM n. TITTLE/Descriptfon ASPECT AREA CLASS REFERENCE IV EMBRITTLEMENT - BASELINE INFORMATION IV EMBRITTLEMENT - BASELINE INFORMATION IV EMBRITTLEMENT

83 ISSUE NUMBER: Components 2 ISSUE TITLE: Embrittlement. Validation

84 CAT. ISSUE ITEM

85 ISSUE NUMBER: Components

86 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE IV EM8RITTLEHENT - FLUX REDUCTION 79 REDUCTION OF FLUENCE TO VESSEL D COMPONENTS 1.10 OESREV III Corrective measures have been taken

87 ISSUE NUMBER: Components

88 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE IV EMBRITTLEMENT

89 ISSUE NUMBER: Components

90 CAT. ISSUE III VESSEL ISI - INSPECTION TECHNIQUES III VESSEL ISI - INSPECTION TECHNIQUES III VESSEL ISI - INSPECTION TECHNIQUES III VESSEL

91 ISSUE NUMBER: Components

92 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II VESSEL

93 ISSUE NUMBER: Components

94 CAT. ISSUE ITEM n. TITUE/Descriptlon ASPECT AREA CLASS REFERENCE III VESSEL STRESS ANALYSIS 82 VESSEL OPERATING HISTORY 0 COMPONENTS 1.15 DESREV HI Vessel operating history data, including process conditions III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS III VESSEL STRESS ANALYSIS

95 ISSUE NUMBER: Components 8 ISSUE TITLE: Leak Before Break Applicability RANK

96 CAT. ISSUE ITEM n. TITTLE/Descnptlon ASPECT AREA CLASS REFERENCE IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV IV IV LEAK BEFORE BREAK APPLICABILITY LEAK BEFORE BREAK APPLICABILITY LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV IV IV LEAK BEFORE BREAK APPLICABILITY LEAK BEFORE BREAK APPLICABILITY LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY IV LEAK BEFORE BREAK APPLICABILITY

97 CAT. ISSUE ITEM n. TITTLE/Descnption ASPECT AREA CLASS REFERENCE IV LEAK BEFORE BREAK APPLICABILITY 1104 DISSIMILAR WELD RESEARCH

98 ISSUE NUMBER: Components 9 ISSUE TITLE: Primary circuit in-service inspection RANK

99 CAT. ISSUE ITEM

100 ISSUE NUMBER: Components

101 CAT. ISSUE ITEM

102 ISSUE NUMBER: Components 11 ISSUE TITLE: Vessel Support Integrity RANK

103 CAT. ITEM n. TITTLË/Description ASPECT AREA III VESSEL SUPPORT INTEGRITY 88 INSPECTION OF VESSEL SUPPORT D+0 COMPONENTS 3.3 OESREV The reactor vessel support structure III VESSEL SUPPORT INTEGRITY

104 ISSUE NUMBER: Components 12 ISSUE TITLE: Secondary Circuit In-Service Inspection RANK OF ISSUE: II ISSUE CLARIFICATION: In-service inspection

105 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II SECONDARY CIRCUIT IN-SERVICE INSPECTION 11 SECONDARY CIRCUIT IN-SERVICE INSPECTION II SECONDARY CIRCUIT IN-SERVICE INSPECTION II II SECONDARY CIRCUIT IN-SERVICE INSPECTION SECONDARY CIRCUIT IN-SERVICE INSPECTION II SECONDARY CIRCUIT IN-SERVICE INSPECTION

106 ISSUE NUMBER: Instrumentation

107 CAT. ISSUE ITEM n. TmLE/Description ASPECT AREA CLASS REFERENCE II II II II II II ACCIDENT MONITORING INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION ACCIDENT MONITORING INSTRUMENTATION 28 BEYOND DBA MONITORING D I&C 4.6 DESREV III Accident monitoring for the core does not exist for beyond Design Basis Accident, e.g. level indication. Hydrogen in primary water. 109 SAFETY PARAMETER DISPLAY D I&C 2.3 DESREV The installation of a computerized safety parameter display system would be of help to the operators for transient and accident management. 125 POST ACCIDENT MONITORING 0 I&C 1.7 DESREV III Check that the range of radiation monitoring corresponds to the maximum possible post accident level. The system shall be provided with on line recording. 346 ACCIDENT MONITORING D l&c 4.6 BOHUM1CE 10.1.(8) Severe accident monitoring instruments should II ACCIDENT MONITORING INSTRUMENTATION II ACCIDENT MONITORING INSTRUMENTATION

108 ISSUE NUMBER:

109 CAT. ISSUE ITEM

110 ISSUE NUMBER: I&C 3 ISSUE TITLE: Control and protection systems interaction RANK OF ISSUE: II ISSUE CLARIFICATION: Full isolation or separation between control and protection functions of instrumentation is not provided. A fault in the non safety related instrumentation may induce the failure of safety related equipment. RELATED ITEMS: 101, 352, 668, 782, 1120 JUSTIFICATION OF RANKING: Control systems faults that

111 CAT. ISSUE ITEM

112 ISSUE NUMBER:

113 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE IV

114 ISSUE NUMBER: I&C 5 ISSUE TITLE:

115 CAT. ISSUE ITEM n TITTLE/Description ASPECT AREA CLASS III I&C SUPPORT TO OPERATION / CONTROL ROOM III

116 CAT. ISSUE ITEM n. TlTTLE/Description ASPECT AREA CLASS REFERENCE operators should

117 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE

118 ISSUE NUMBER: I&C 6 ISSUE TITLE: Interlocking RANK OF ISSUE: II ISSUE CLARIFICATION: Insufficient automatic interlocking

119 CAT. ISSUE ITEM n. TITTLE/Descriptlon ASPECT AREA CLASS REFERENCE II INTERLOCKING 11 INTERLOCKING II INTERLOCKING II INTERLOCKING II INTERLOCKING 11 INTERLOCKING II INTERLOCKING II INTERLOCKING II II INTERLOCKING INTERLOCKING II INTERLOCKING II INTERLOCKING II INTERLOCKING II II INTERLOCKING INTERLOCKING II INTERLOCKING II INTERLOCKING 11 INTERLOCKING

120 CAT. ISSUE ITEM

121 ISSUE NUMBER:

122 CAT. ISSUE ITEM n. TITTLE/Descnption ASPECT AREA CLASS REFERENCE III I&C / ELECTRICAL EQUIPMENT QUALIFICATION HI I&C / ELECTRICAL EQUIPMENT QUALIFICATION III I&C / ELECTRICAL EQUIPMENT QUALIFICATION Ut I&C / ELECTRICAL EQUIPMENT QUALIFICATION III I&C / ELECTRICAL EQUIPMENT QUALIFICATION

123 ISSUE NUMBER:

124 CAT. ISSUE ITEM

125 ISSUE NUMBER:

126 CAT. ISSUE ITEM

127 ISSUE NUMBER:

128 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE III TESTABILITY

129 ISSUE NUMBER: I&C 11 ISSUE TITLE: Control Room Habitability/Remote Shutdown Panel RANK OF ISSUE: III ISSUE CLARIFICATION: There is insufficient provision to maintain control room habitability. In case of main control room inhabitability or unavailability, there is no other centralized location from where

130 CAT. ISSUE ITEM n. TlTTLE/Description ASPECT AREA REFERENCE III CONTROL ROOM HABITABI

131 ISSUE NUMBER:

132 CAT. ISSUE ITEM

133 ISSUE NUMBER: Electrical

134 CAT. ISSUE ITEM

135 CAT. ISSUE ITEM

136 ISSUE NUMBER: Electrical 2 ISSUE TITLE: Reliability

137 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE III RELIABILITY OF ELECTRICAL EQUIPMENT III RELIABILITY OF ELECTRICAL EQUIPMENT [II RELIABILITY

138 ISSUE NUMBER: Electrical 3 ISSUE TITLE: Diesel Generator Loading RANK

139 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE IV IV DIESEL GENERATOR LOADING DIESEL GENERATOR LOADING 144 DIESEL GENERATOR RATING D ELECTRICAL 1.5 DESREV S.O.5.4 Relative low rating of 1600 ku is a concern. For LOCA conditions two Diesels are necessary to provide necessary power. IV DIESEL GENERATOR LOADING IV DIESEL GENERATOR LOADING IV DIESEL GENERATOR LOADING

140 ISSUE NUMBER: Electrical

141 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 11! BATTERY DISCHARGE TIME 133 BATTERIES 111 BATTERY DISCHARGE TIME III BATTERY DISCHARGE TIME III BATTERY DISCHARGE TINE

142 ISSUE NUMBER: Electrical 5 ISSUE TITLE: Connection to offsite Power Supplies RANK OF ISSUE: II ISSUE CLARIFICATION: The need for manual action to restore off-site supplies following a reactor trip places unnecessary demands on the diesel generators. RELATED ITEMS (AND PRIORITIES): 141, 142, 368, 676, 813 JUSTIFICATION OF RANKING: Loss

143 CAT. ISSUE ITEM n. T!TTLE/Description ASPECT AREA CLASS REFERENCE II CONNECTION TO OFF-SITE POUER SUPPLIES U1 EXTERNAL POWER SOURCES D ELECTRICAL 4.3 DESREV Confirm that

144 ISSUE NUMBER: Accident Analysis

145 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III COMFINEHENT ANALYSIS 67 FLAP CHARACTERISTICS D SYSTEMS 3.7 DESREV B III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS III CONFINEMENT ANALYSIS

146 ISSUE NUMBER: Accident Analysis

147 CAT. ISSUE ITEM

148 ISSUE NUMBER: Accident Analysis 3 ISSUE TITLE: Severe accident analysis RANK

149 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II SEVERE ACCIDENT ANALYSIS

150 ISSUE NUMBER: Accident Analysis

151 CAT. ISSUE ITEM

152 ISSUE NUMBER: Accident Analysis

153 CAT. ITEM

154 CAT. ISSUE II QUALIFICATION OF SAFETY ANALYSIS II II QUALIFICATION OF SAFETY ANALYSIS QUALIFICATION

155 ISSUE NUMBER: Accident Analysis 6 ISSUE TITLE: Scope

156 CAT. ISSUE ITEM

157 CAT. ISSUE ITEM

158 CAT. ISSUE ITEM

159 ISSUE NUMBER: Accident Analysis 7 ISSUE TITLE: Loss of coolant accidents RANK

160 CAT. ISSUE HEM n. TlTTLE/Oescription ASPECT AREA CLASS REFERENCE III LOSS

161 CAT. ISSUE III LOSS

162 ISSUE NUMBER: Accident Analysis 8 ISSUE TITLE: Radiological consequences RANK

163 CAT. ISSUE ITEM n, TITTLE/Descnption ASPECT AREA CLASS REFERENCE II RADIOLOGICAL CONSEQUENCES 11 RADIOLOGICAL CONSEQUENCES II II RADIOLOGICAL CONSEQUENCES RADIOLOGICAL CONSEQUENCES

164 ISSUE NUMBER: Accident Analysis 9 ISSUE TITLE: Evaluation

165 CAT. ISSUE ITEM n. TITTlE/Description ASPECT AREA CUSS REFERENCE III EVALUATION OF MODIFICATIONS III EVALUATION OF MODIFICATIONS III EVALUATION OF MODIFICATIONS

166 ISSUE NUMBER: Fire Protection

167 CAT. ISSUE ITEM

168 ISSUE NUMBER: Fire Protection

169 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III FIRE PROTECTION

170 ISSUE NUMBER: Fire Protection 3 ISSUE TITLE: Fire Protection. Inspection RANK OF ISSUE: III ISSUE

171 CAT. ISSUE ITEM

172 4. OPERATIONAL ISSUES 179

173 ISSUE NUMBER: Management

174 CAT. ISSUE ITEM

175 ISSUE NUMBER: Management 2 ISSUE TITLE: Management Development RANK

176 CAT. ISSUE ITEM

177 ISSUE NUMBER: Management

178 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE IV SAFETY CULTURE

179 ISSUE NUMBER: Management 4 ISSUE TITLE: Housekeeping RANK

180 CAT. ISSUE ITEM

181 ISSUE NUMBER: Management 5 ISSUE TITLE: Organization RANK OF ISSUE: III ISSUE CLARIFICATION: An adequate organization provides for clear responsibilities, lines of communication, and enhances the plant's ability to accomplish common goals. The structure of the organization should insure that important areas

182 CAT. ISSUE ITEM

183 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III ORGANIZATION have III ORGANIZATION III ORGANIZATION III ORGANIZATION III ORGANIZATION III ORGANIZATION III ORGANIZATION III ORGANIZATION

184 ISSUE NUMBER: Management 6 ISSUE TITLE: Modification Control RANK

185 CAT. ISSUE ITEM

186 ISSUE NUMBER: Management 7 ISSUE TITLE: Document Management RANK OF ISSUE: I ISSUE CLARIFICATION:

187 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 1 DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT 201 STORAGE OF QUALITY RECORDS 0 HOA 1.19 BOHUNICE 1.6.(2) Quality records should be kept in fire proof cabinets and in rooms equiped with smoke detectors. I DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT I I I I DOCUMENT MANAGEMENT DOCUMENT MANAGEMENT DOCUMENT MANAGEMENT DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT 1 DOCUMENT MANAGEMENT I DOCUMENT MANAGEMENT

188 ISSUE NUMBER: Management 8 ISSUE TITLE: Configuration Management RANK

189 CAT. ISSUE ITEM n. TlULE/Oescription ASPECT AREA CLASS REFERENCE III CONFIGURATION MANAGEMENT 413 CENTRALIZED RECORD SYSTEM III CONFIGURATION MANAGEMENT III CONFIGURATION MANAGEMENT

190 ISSUE NUMBER: Management

191 CAT. ISSUE ITEM

192 ISSUE NUMBER: Management

193 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE II! QUALITY ASSURANCE 194 INDEPENDENT CHECK III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE III QUALITY ASSURANCE

194 ISSUE NUMBER: Management

195 CAT. ISSUE ITEH

196 ISSUE NUMBER: Management 12 ISSUE TITLE: Industrial Safety Practices RANK

197 CAT. ISSUE ITEM

198 ISSUE NUMBER: Management

199 CAT. ISSUE ITEM n. TITTLE/Oescrlption ASPECT AREA CLASS REFERENCE I I COHPUTER UTILIZATION COHPUTER UTILIZATION 193 I COHPUTER UTILIZATION I I I I COHPUTER UTILIZATION COHPUTER UTILIZATION COHPUTER UTILIZATION COHPUTER UTILIZATION I COMPUTER UTILIZATION I COHPUTER UTILIZATION

200 ISSUE NUMBER: Operating Procedures 1 ISSUE TITLE: Procedures. Program RANK

201 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE II PROCEDURES - PROGRAMME II PROCEDURES - PROGRAMME II PROCEDURES - PROGRAMME II PROCEDURES - PROGRAMME II PROCEDURES

202 ISSUE NUMBER: Operating Procedures 2 ISSUE TITLE: Emergency Operating Procedures RANK

203 CAT. ISSUE ITEM

204 ISSUE NUMBER: Operating Procedures

205 CAT. ISSUE ITEM

206 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III LIMITS

207 ISSUE NUMBER: Operating Procedures 4 ISSUE TITLE: Procedures. Operation RANK OF ISSUE: II ISSUE CLARIFICATION: Operating personnel should be provided with detailed instructions to control locked valves, operate systems, coordinated plant startup/shutdown, conduct shift turnovers

208 CAT. ISSUE ITEM n, TITTLE/Oescription ASPECT AREA CLASS REFERENCE II II PROCEDURES - OPERATION PROCEDURES

209 ISSUE NUMBER: Plant Operations 1 ISSUE TITLE: Surveillance Program RANK

210 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II SURVEILLANCE PROGRAMME II II II SURVEILLANCE PROGRAMME SURVEILLANCE PROGRAMME SURVEILLANCE PROGRAMME II SURVEILLANCE PROGRAMME II SURVEILLANCE PROGRAMME II SURVEILLANCE PROGRAMME II SURVEILLANCE PROGRAMME II SURVEILLANCE PROGRAMME

211 ISSUE NUMBER: Plant Operations 2 ISSUE TITLE: Procedures. Surveillance RANK OF ISSUE: III ISSUE CLARIFICATION: Personnel should

212 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 111 PROCEDURES - SURVEILLANCE III PROCEDURES

213 ISSUE NUMBER: Plant Operations

214 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE lit WORK CONTROL 252 TAGGING SYSTEM III UORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III WORK CONTROL III UORK CONTROL III WORK CONTROL III WORK CONTROL III UORK CONTROL III UORK CONTROL III UORK CONTROL III WORK CONTROL

215 ISSUE NUMBER: Plant Operations 4 ISSUE TITLE: Organization of Shifts RANK

216 CAT. ISSUE ITEM

217 ISSUE NUMBER: Plant Operations

218 CAT. ISSUE ITEM n. TITTLE/Descnption ASPECT AREA CLASS REFERENCE II LABELS

219 ISSUE NUMBER: Plant Operations

220 CAT. ISSUE ITEM n. TITTLE/Descrlptlon ASPECT AREA CLASS REFERENCE I CHEMISTRY 769 STRESS CORROSION MONITORING D COMPONENTS 1.10 NOVOVORONE 9.1.<2) Water chemistry of the primary circuit requires utmost attention. Aggressive impurities will

221 ISSUE NUMBER: Maintenance l ISSUE TITLE: Maintenance Program RANK

222 CAT. ISSUE ITEM n. TITTLE/Oescnption ASPECT AREA CLASS REFERENCE II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II II II MAINTENANCE PROGRAMME MAINTENANCE PROGRAMME MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II II MAINTENANCE PROGRAMME MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME II MAINTENANCE PROGRAMME

223 ISSUE NUMBER: Maintenance

224 CAT. ISSUE ITEM

225 ISSUE NUMBER: Maintenance 3 ISSUE TITLE: Equipment Material Conditions RANK OF ISSUE: IV ISSUE CLARIFICATION: Equipment should be maintained in a state of readiness so that it can reliably operate. Immediate action is required to restore safety equipment to their design conditions. RELATED ITEMS: 491, 513, 514, 799, 833, 966, 1153, 1154, 1288, 1289, JUSTIFICATION

226 CAT. ISSUE ITEM

227 ISSUE NUMBER: Maintenance 4 ISSUE TITLE: Warehouse RANK

228 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE I WAREHOUSES 530 IMPROVE WAREHOUSES 0 MAINT 1.19 KOZLODUY 4.7.(5) The existing warehouses should be improved by improving door seals and windowsand installing ventilation. I WAREHOUSES 983 SPARE PARTS CLEANNESS 0 MAINT 1.19 NOVOVORONE 4.8.(1) The centralized warehouse and the spare parts should be kept clean. I WAREHOUSES 984 STAINLESS STEEL 0 MAINT 1.19 NOVOVORONE 4.8.(2) A special store should be used for stainless steel. I WAREHOUSES 985 HOLD STORE 0 MAINT 1.19 NOVOVORONE 4.8.(3) A separate "hold" store should be set up for spare parts that await quality control checks. 238

229 ISSUE NUMBER: Training

230 CAT. ISSUE ITEM

231 CAT. ISSUE ITEM III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME 111 TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME

232 CAT. ISSUE ITEM III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME III TRAINING PROGRAMME

233 ISSUE NUMBER: Training

234 CAT. ISSUE ITEM

235 ISSUE NUMBER: Training 3 ISSUE TITLE: Training Facilities RANK

236 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE II TRAINING - FACILITIES II TRAINING

237 ISSUE NUMBER: Training

238 ISSUE ITEM n. Time/Description ASPECT AREA CLASS REFERENCE til TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL III TRAINING MATERIAL

239 ISSUE NUMBER: Training 5 ISSUE TITLE: Training Records RANK

240 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 1 TRAINING RECORDS 211 TRAINING RECORDS 0 TO 1.19 BOHUNICE 2.1.(8) Install computerized central training records. I TRAINING RECORDS

241 ISSUE NUMBER: Emergency Planning 1 ISSUE TITLE: Emergency Response Programme RANK OF ISSUE: III ISSUE CLARIFICATION: An effective Emergency Response Programme must address all essential aspects of accident assessment and classification, on-site planning, off-site planning and coordination. RELATED ITEMS: 284, 285, 286, 287, 545, 546, 549, 556, 559, 561, 577, 578, 579, 1003, 1004, 1006, 1007, 1008, 1010, 1015, 1018, 1315, 1316, 1319 JUSTIFICATION

242 CAT. ISSUE ITEM n. TITTLE/Oescription ASPECT AREA CLASS REFERENCE III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME 284 ON SITE EMERGENCY PLAN 0 EP 5.2 BOHUNICE 6.2.(1) Comprehesive emergency plan should be prepared, including: actions to correct abnormal conditions, assessmen of potential consequences, activating emergency arrangements, recommending protective measures. It should describe the organizational units, their functions and tasks. 285 ON Off SITE INTERFACE 0 EP 5.2 BOHUNICE 6.2.(2) III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME til EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME 111 EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME 111 EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME III EMERGENCY RESPONSE PROGRAMME

243 CAT. ISSUE 1TEH

244 ISSUE NUMBER: Emergency Planning 2 ISSUE TITLE: Emergency Response Procedures RANK

245 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE 111 EMERGENCY RESPONSE - PROCEDURES III EMERGENCY RESPONSE

246 ISSUE NUMBER: Emergency Planning 3 ISSUE TITLE: Emergency Response Facilities RANK OF ISSUE: III ISSUE CLARIFICATION: Facilities and equipment should be available to properly monitor, coordinate and respond

247 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III EMERGENCY RESPONSE - FACILITIES III EMERGENCY RESPONSE

248 CAT. ISSUE ITEM n. TITTLE/Description ASPECT AREA CLASS REFERENCE III EMERGENCY RESPONSE - FACILITIES 1325 IODINE TABLETS STORAGE 0 EP 5.2 KOLA 6.4.(6) Iodine tablets should be wrapped in foil and stored in containers indicating type of tablets and expiration date. Ill EMERGENCY RESPONSE

249 ISSUE NUMBER: Emergency Planning

250 CAT. ISSUE II EMERGENCY RESPONSE

251 ISSUE NUMBER: Emergency Planning

252 CAT. ISSUE ITEM

253 RD - Reference Documents REFERENCES

254 LIST

255 THE RUSSIAN FEDERATION

256 Project Review Meeting Safety of WWER 440 Model 230 Plants 28 October to 1 November 1991 AUSTRIA Mr. G. Weimann Austrian Research Centre Seibersdorf Vienna BULGARIA Mr. B. Dimitrov Institute Energoproekt 1407 Sofia 51 Anton Ivanov blvd Mr.

257 SPAIN Mr.

258 IAEA PARTICIPANTS Mr. L. Lederman Mr. C. Almeida Mr. J. Hoehn Mr. B. Gachot Mr. R. Havel Mr. A. Erwin Ms. A. Carnino Mr. B. Moore Mr. - Scientific Secretary - NENS/SAS - Safety Assessment Section/NENS - Safety Assessment Section/NENS - Safety Assessment Section/NENS - NENF - NPP Operational Safety Services/NOSS - Advisor, NENS - NPP Operational Safety Services/NOSS

259 Steering Committee Meeting Safety

260 SPAIN Mr.

261 COMMISSION

262 IAEA PARTICIPANTS Mr. M. Rosen Mr. - DIR/NENS

CONTENTS OF THE PCSR CHAPTER 1 - INTRODUCTION AND GENERAL DESCRIPTION

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