2. PREEV PROJECT: REGULATORY PRACTICES ON AGEING AND LIFE EXTENSION
TDs: GENERAL APPROACH TD1: REGULATORY CRITERIA TD4: PERIODIC SAFETY REVIEW
PREEV PROJECT: REGULATORY PRACTICES ON AGEING AND LIFE EXTENSION
IAEA CONSULTANTS MEETING
VIENNA, APRIL 2012
D. ENCINAS (CSN, SPAIN)

3. PREEV PROJECT CONTENTS
TDs: GENERAL APPROACH
TD1: GUIDE FOR REGULATORY CRITERIA ON AGEING MANAGEMENT AND LONG-TERM OPERATION OF NUCLEAR POWER PLANTS
TD4: GUIDE FOR THE PERIODIC SAFETY REVIEW OF NUCLEAR POWER PLANTS APPLIED TO THE AGEING MANAGEMENT AND LONG-TERM OPERATION ASPECTS

4. PREEV PROJECT TDs: GENERAL APPROACH
purpose: to be used, in whole or in part, by each country, as guidelines, and to develop national regulations or regulatory practices
objectives:
to establish criteria to request implementation of an AM system, including LTO
to establish guidelines for regulatory practices: licensing and oversight (control / inspection)
bases and references:
IAEA standards
FORO countries regulations and experience
“key countries” regulations (USA, Canada, Germany,…)
reference levels (RLs) of WENRA

5. PREEV PROJECT TD1: REGULATORY CRITERIA ON AM & LTO OF NPPs
objective: to establish general regulatory criteria for AM
scope:
PWR/BWR/CANDU/PHWR
physical ageing & obsolescence
three different stages:
design life  PLiM Plan
requesting / licensing LTO  IPA
LTO period  LT-PLiM Plan

6. PREEV PROJECT TD1: REGULATORY CRITERIA ON AM & LTO OF NPPs
key elements:
states scope criteria for elements (SSCs) within the AM program, based on:
function of integrity of the RCS boundary
functions of shutdown / maintain safe shutdown
functions of prevent /mitigate accidents
SSCs whose failure could affect safety functions
SSCs credited in safety analyses (SAR)
states specific requirements for plans (PLiM plan / IPA / LT-PLiM plan), on:
screening criteria for SSCs
identification of ageing mechanisms
assessment of maintenance practices & AMPs
time limited ageing analyses (TLAAs)
obsolescence management

7. PREEV PROJECT TD1: REGULATORY CRITERIA ON AM & LTO OF NPPs
documentation: establishes specific requirements on scope, content and submision of reports for each stage:
AM periodic reports during design life
AM report to request authorization for LTO
AM periodic reports during LTO period

8. PREEV PROJECT TD4: PSRs OF NPPs APPLIED TO AM & LTO ASPECTS
objective: to provide guidelines to assess the documentation of PSRs in the aspects related to AM & LTO
scope:
PWR/BWR/CANDU/PHWR
physical ageing & obsolescence
PSRs applying during design life / PSRs associated to licensing of LTO or to LTO period

9. PREEV PROJECT TD4: PSRs OF NPPs APPLIED TO AM & LTO ASPECTS
key elements:
identifies specific objectives of PSRs regarding AM
identifies scope of PSRs activities regarding AM
identifies specific conditions and requirements for PSRs associated to licensing of LTO or to LTO period
ANALYSES AND PROVIDES GUIDELINES TO ASSESS PSRs DOCUMENTATION FROM THE AM POINT OF VIEW, BY SAFETY FACTORS

10. PREEV PROJECT: TD4 safety factor impact of AM guidelines
1 plant design
high
specific analysis / expected results
2 current conditions of SSCs
very high
in-depth analysis / expected results
3 equipment qualification
4.a AM (design life)
100 %
4.b AM (LTO request)
5 deterministic safety analysis
low
review only some aspects
6 probabilistic safety analysis
7 hazard analysis
8 safety performance
none
9 operating experience & research
10 organization & administration
11 procedures
12 the human factor
significant
13 emergency plan
14 radiological impact
review only some aspects (for LTO)