ML20011D367
| ML20011D367 | |
| Person / Time | |
|---|---|
| Issue date: | 12/19/1989 |
| From: | Taylor J NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| To: | Michelson C Advisory Committee on Reactor Safeguards |
| Shared Package | |
| ML20011D368 | List: |
| References | |
| ACRS-GENERAL, GL-88-20, NUDOCS 8912270069 | |
| Download: ML20011D367 (6) | |
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UNITED STATES NUCLEAR RESULATORY COMMISSION T
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DEC 191989 -
8 MEMORANDUM FOR: 'Carlyle Michelson, Acting Chairman Advisory Committee on Reactor Safeguards
'FROM:-
James M. Taylor-Executive Director for Operations s
SUBJECT:
DRAFT SUPPLEMENT NO. 2-T0 GENERIC LETTER 88-20,
" ACCIDENT MANAGEMENT STRATEGIES FOR CONSIDERATION IN THE INDIVIDUAL PLANT EXAMINATION PROCESS" In-its November 20, 1989 letter, the ACRS commented on the staff's proposal to issue to the industry a list of accident management strategies which L
have been derived from past probabilistic risk assessment (PRA) studies. The staff plans to issue this information as Generic Letter 88-20, Supplement 2,
" Accident Management Strategies for Consideration in the Individual Plant 1
g' Examination Process." The staff also proposes to attach a NUREG/CR report l
entitled, " Assessment of Candidate Accident Management Strategies " which outlines the advantages and adverse effects of each strategy.
j The staff. appreciates ACRS' conclusion that the documents contain information i
useful to the industry, and ACRS' agreement that the documents should be issued.
n ACRS'- recommendation to include information on the potential risk reduction to be gained from implementing.the strategies is a useful one. Accordingly, the 1
. staff.will modify the introduction to the NUREG/CR report to reference the analyses in NUREG/CR-5263, "The Risk Management Implications of NUREG-1150 Methods and Results." The staff believes that citing a general reference is more appropriate than quoting risk reduction values for specific strategies j
- because the actual risk reduction potential of a given measure is very plant specific.
It would be misleading to imply that different plants could achieve j
the same results for a given strategy as those described in NUREG/CR-5263.
l The ACRS letter also raises the possibility of confusion on the part of NRC staff and the industry over the use of the term " accident management strategies" to describe operator actions which,)in many cases, have been implemented as emer-gency operating procedures (E0Ps.
new discipline, the staff has discussed extensively issues of terminology. The use of the term " accident management strategy" rather than " procedure" was a conscious decision, motivated in part by comments from within NRC and from the indu stry..
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The term " procedure" generally refers to a carefully defined and reviewed xsequence of step-by-step-actions in response to a specific set of plant symptoms. By contrast, the staff's " strategies" outline broadly defined approaches that we believe would be effective for a variety of accident sequences. The actual-implementation of a strategy at a specific plant night-be'in the form of an E0P or other type of procedure, or alternatively through less prescriptive guidance to the staff of the Technical Support Center. The decision should be made in the context of each utility's operating philosophy.
Furthermore, the details of implementation would depend on the availability and configuration of hardware at each plant. The staff believes the term
" accident-management strategy" accurately conveys this flexibility.
- The staff has used the term throughout its interaction with NUMARC and other-industry groups and its use has caused no confusion. As a consequence, although we recognize your concern, we believe the current terminology is sufficiently clear.
Original Signed By James M.Taylot '
James M. Taylor Executive Director for Operations lcc: Chairinan Carr Conaissioner Roberts Connissioner Rogers Counissioner Curtiss Connissioner Remick SECY Distribution Central File HThompson FMiraglia PTSB Rdg JBlaha JPartlow PMAS Rdg EBeckjord DCrutchfield NRC PDR RBernero DMossburg,PMAS(GRN#0004932)
Local PDR EJordan (ACRSMEETING)
ED0 #0004932 JScinto EDO Rdg HPastis TMurley TCox JSniezek RBarrett JTaylor BSheron
~ Reviewed by Tech Editor on 11/30/89.
- See previous concurrence
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2 The term " procedure" generally refers to a carefully defined and reviewed quence of step-by-step actions in response to a specific set of plant s
toms. By contrast, the staff's " strategies" outline broadly defined app aches that we believe would be effective for a variety of accident seque es. The actual implementation of a strategy at a specific plant might be in t form of an E0P or other type of procedure, or alternatively through less pres iptive guidance to the staff of the Technical Support Center. The decision sh id be made in the context of each utility's operating philosophy.
Furthermore, e details of implementation would depend on the availability and configurati of hardware at each plant. The staff believes the term
" accident manage nt strategy" accurately conveys this flexibility.
The staff has used t term throughout its interaction with NUMARC and other industry groups and-1 use has caused no confusion. As a consequence, although we recognize y r concern, we believe the current terminology is-sufficiently clear.
I James M. Taylor Executive Director for Operations cc: Chairman Carr Comissioner Roberts Comissioner Rogers Comissioner Curtiss Comissioner Remick.
SECY l
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Reviewed by Tech Editor on 11/30/89.
- See previous concurrence
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- PTSB:PMAS
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2 The term " procedure" generally refers to a carefully defined and reviewed sequence of step-by-step actions in response to a specific set of plant symptoms. By contrast, the staff's " strategies" outline broadly defined approaches that we believe would be effective for a variety of accident sequences. The actual implementation of a strategy at a specific plant might be in the form of an E0P or other type of procedure, or alternatively through less prescriptive guidance to the staff of the Technical Support Center. The decision should be made in'the context of each utility's operating philosophy.
Furthermore, the details of implementation would depend on the availability and configuration of hardware at each plant. The staff believes the term
" accident management strategy" accurately conveys this flexibility.
The staff has used the term throughout its interaction with NUMARC and other industry groups and its use has caused no confusion. As a consequence, although we recognize your concern, we believe the current terminology is sufficiently clea'r.
N James ti. Taylor Acting Executive Director for Operations cc: Chairman Carr Connissioner Roberts Connissioner Rogers Commissioner Curtiss Conmissioner Remick SECY Distributio_n Central File HThompson FMiraglia PTSB Rdg JBlaha JPartlow PMAS Rdg EBeckjord Crutchfield NRC PDR RBernero iossburg,FilAS(GRN#0004932)
Local PDR EJordan ED0 #0004932 JScinto EDO Rdg HPastis TMurley TCox JSniczek RBarrett JTaylor (ACRS MEETING)
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Reviewed by Tech Editor on 11/30/89.
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DUE: 12/08/89 EDO CONTROL: 0004932 IIOM DOC DT: 11/20/89 w
FINAL REPLY:-
<;Forrest~J'. Remick
.ACRS' y
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.' Chairman Carr FOR' SIGNATURE OF:
- GRN CRC-NO 89-1251.
' Executive Director DESC::
ROUTING:
-DRAFTjSUPPLEMENT NO.' 2'TO GENERIC LETTER 80-20, Taylor 1
" ACCIDENT / MANAGEMENT' STRATEGIES FOR CONSIDERATION Thompson c-IN THE-INDIVIDUAL PLANT EXAMINATION PROCESS" Blaha Beckiord, RES
r.ONTACT:
Scinto, OGC '
.NRRi Murley Central Files
- SPECIAL' INSTRUCTIONS OR REMARKS:
PREPARE RESPONSE TO:ACRS FOR EDO'S SIGNATURE.
-PUT'COMMISSIONERStAND SECY ON~CC (SHOWN-ON ORIGINIAL FOR REPLY).
.HRR RECEIVED: NOVEMBER,.24~, 1989'
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CRC-89-1261 LOGGING DATE: Nov 22'89--
. ACTION OFFICE::
EDO 4
AUTHOR:~
Forrest J. Remick
' AFFILIATION:;
' ACRS (ADVISORY COMMITTEE ON REACTOR SAFEGUARDS)
LETTER'DATE:'
Nov:20 89 FILE CODE: O&M-7 ACRS
SUBJECT:
Draft suppl No. 2!to generic ltr 88-20, accident I
management strategies for-consideration in the
- individual plant examination process'
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