SAFETY ASSESSMENT OF EMERGENCY ELECTRIC POWER SYSTEMS FOR NUCLEAR POWER PLANTS

Transcription

1 IAEA-TECOOC-390 SAFETY ASSESSMENT OF EMERGENCY ELECTRIC POWER SYSTEMS FOR NUCLEAR POWER PLANTS A MANUAL ON THE USE OF IAEA SAFETY SERIES No.50-SG-D7: EMERGENCY POWER SYSTEMS AT NUCLEAR POWER PLANTS A TECHNICAL DOCUMENT ISSUED BY THE INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, 1986

2 SAFETY ASSESSMENT

3 ALL PLEASE BE AWARE THAT

4 The IAEA does not normally maintain stocks of reports in this series. However, microfiche copies of these reports can be obtained from IN IS Clearinghouse International Atomic Energy Agency Wagramerstrasse 5 P.O. Box 100 A-1400 Vienna, Austria Orders should be accompanied by prepayment of Austrian Schillings 100,

5 FOREWORD

6 CONTENTS I. PREFACE... 7 II. INTRODUCTION...

7 4. EQUIPMENT AND COMPONENTS DISTRIBUTION SYSTEM SWITCHING COMPONENTS STANDBY ELECTRIC POWER SUPPLY UNITS AND SUPPORT SYSTEMS...

8 I. PREFACE

9 the plant supplier

10 should include

11 (3) The third part of the assessment deals with the adequacy of the systems as constructed on site. It refers to the QA programme including inspection

12 H. INTRODUCTION This paper

13 ffl. SAFETY ASSESSMENT REVIEW GUIDANCE aware As a starting point of his review, the safety assessor must become

14 Table

15 the forword

16 1. OFF-SITE

17 forced outage frequency of the nuclear unit to an unacceptable level, given

18 following:

19

20 2. ON-SITE

21 Single Failure

22 Some components

23 2.3 INDEPENDENCE AND PHYSICAL SEPARATION Basis for Acceptance Code, sections 2.10, 2.12 ^ SG-D7, relevant parts of sections 4.1, 4.2, 4.3, 4.4, , À-3.2, A-4, in particular A.4.4 Assessment Questions

24 separation

25 (4) Are the components and equipment for the EEPS housed and/or otherwise protected so as to remain functional against the direct and consequential effects (including the failure of unqualified equipment and structures) of tornados, hurricanes, tsunami and seiches, i.e., of high winds, missiles, floods, etc,

26 contain

27

28 the nuclear power station. In order to specify acceptable electrical parameters for the EEPS several aspects have to be considered including: Load surveys

29

30

31 2.8.4 Voltage Considerations System voltage studies

32

33 Proper coordination of protective devices allows energisation and operation of the EEPS, start-up and operation of required loads, and the selective isolation of faults so as to localise the disturbance and minimise the effects on the EEPS. Short circuit studies are also performed for the EEPS and are used to:

34 (5) Are the protective device ratings and capabilities adequate for the maximum overload and short circuit current service for which they are applied under all credible conditions?

35 2.10 SHARING

36 conform with the requirements related to redundancy, electrical and physical independence contained in sections 2.2 and 2.3 conformed to? 2.11 INSTRUMENTATION, MONITORING AND CONTROL OF THE EEPS Basis

37 2.12 IDENTIFICATION

38 of the components of the system and the operability of the EEPS as a whole in a manner as close to design as practicable?

39

40 3. ON-SITE

41 (2) Does the d-c system conform to the design principles, requirements and acceptance criteria of Section 2? (3) Does the d-c system meet the single failure criterion? (4) Do the batteries, battery chargers and inverters conform to the required capacities stated above?

42

43

44 accident conditions should show that the diesel engines will perform according to the required power output taking into account start up time and electrical load sequence programme.

45 (6) What measures have been taken to avoid common cause failures in more than

46

47 (3) Is the storage volume in accordance with consumption calculations

48 Assessment Questions

49 (3) Are there adequate measures in the control room to indicate any battery room ventilation defects?

50

51

52 (2) Are the penetrations compatible with the cables which are leading

53 5. AD DIT ION AL CON SIDE RAT ION S

54 Basis for Acceptance SG-D7, section A-3.7 Assessment Questions

55 Assessment Questions (1) Is emergency lighting provided at strategic locations as identified and described above? (2) Is the emergency lighting provided for the control room independent of normal lighting?

56 IV. REFERENCE LIST OF RECOMMENDED INFORMATION FOR THE SAFETY ASSESSMENT This chapter provides information

57 It should also

58 Documentation to be submitted TABLE 1

59 o\ o Documentation

60 Documentation to be submitted by applicant Reference

61 CCv K) Documentation to be submitted by applicant

62 2.12 Identification of Equipment, Components end Documents 2.13 Provisions

63 o\ -f». Documentation

64 Documentation to be submitted

65 ON Documentation

66 Documentation to be submitted

67 OO Documentation

68 Documentation to be submitted

69 L BIBLIOGRAPHY objectives. The bibliography provided in this chapter is to serve 'two

70 FEDERAL REPUBLIC OF GERMANY VDE Standards, obtainable from VDE-Verlag GmbH, Bismarckstrasse

71 Other Guidelines obtainable from Deutsches Institut für Normung e.v., Postfach 1107, D-1000 Berlin

72 KTA No. *2206 *2207 Title Auslegung von Kernkraftwerken gegen Blitzeinwirkungen (Draft) (Design *3403 *3501 *3504 * * * * *3703 *3704 *3705

73 KTA No. Title *3706 Nachweis der Beständigkeit von elektrischen Einrichtungen unter Störfallbedingungen (Resistance of Electrical Equipment for Incident Conditions) *3904 Warte, Notsteuerstelle und örtliche Leitstände in Kernkraftwerken (6/85) (Control Room

74 FRANCE REGLES FONDAMENTALES DE SURETE (RFS) ETABLIES PAR LE SERVICE CENTRAL

75 R.F.S IV.2.b

76 N.F.C

77

78 UNITED KINGDOM HM Nuclear Installations Inspectorate Safety Assessment Principles for Nuclear Power Plants ISBN

79 UNITED STATES

80 Division 1 Regulatory Guides (RG) Power Reactors RG No. Titie 1.6 Independence Between Redundant Standby (Onsite) Power Sources and Between Their Distribution Systems (Rev.O, 3/71) 1.9 Selection of Diesel Generator Set Capacity for Standby Power Supplies (Rev. 0, 3/71) 1.22 Periodic Testing

81 IEEE

82 IEEE

83 IEEE

84 No. Title *C Schedules

85 INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC Publications available from IEC Central Office, 3 rue de Varembé, 1211 Geneva 20, Switzerland IEC

86 lec No. Title *300 Reliability

87 LIST OF PARTICIPANTS