ML20140C885

Staff Requirements Memo Re SECY-97-077, Draft Rg,Std Review Plans & NUREG Document in Support of Risk Informed Regulation for Power Reactors

ML20140C885
Person / Time
Issue date:	06/05/1997
From:	Hoyle J NRC OFFICE OF THE SECRETARY (SECY)
To:	Callan L NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO)
References
REF-10CFR9.7 FACA, SECY-97-077-C, SECY-97-77-C, NUDOCS 9706100104
Download: ML20140C885 (2)

Text

-

~

f * * %

UNITED STATF S syg c;

NUCLE AR REGULATORY COMMISSION y( 'l (Ef' "

W ASmNGTON, D C 20555 13 f.:

mt S8

[

%, vjf June 3, 1997

,0 ^ '

{

OFFICE OF THE SE C R E T AR v'

..w.

f MEMORANDUM TO:

L. Joseph Callan Execu iv Dir ctor for Operations

(~

ACu -

John '. Hoyl Secretary FROM:

SUBJECT:

STn F REQUIREMENTS - SECY-97-077 - DRAFT

/

STANDARD REVIEW PLANS AND REGULATORY GUIDES, NUREG DOCUMENT IN SUPPORT OF RISK INFORMED REGULATION FOR POWER REACTORS regula' tory The Commission has approved publication of the draftfor a 90-day standard review plans and NUREG document

guides, public comment period.

6/13/97)

(SECY Suspense:

(EDO)

The staff should provide the Commission information on its plans to be for conducting public workshops.

The public workshop (s) period should be of conducted during the public commentsufficient duration and depth to p the approaches described in the documents.

the staff should provide the Commission information on the risk-informed In addition, on its plans for training the NRC staff 1) contained in the regulatory guidance regulatory approachtes) in overall PRA methods and standard review plan documents and 2)Particular attention should be give techniques.

the regional level.

basic user-level knowledge of PRA methods at 9/30/97)

(SECY Suspense:

(EDO)

The staff should continue to evaluate the proposed d l

The staff should also develop guidance on how to confirm thelicensing basis assumptions and analyses used to justify current changes.

Of0.5

,9 I

AND THE COMMISSION VOTING SECY-97-077, THIS SRM, RECORD CONTAINING THE VOTE SHEETS OF ALL SECY NOTE:

COMMISSIONERS WILL BE MADE PUBLICLY AVAIL WORKING DAYS FROM THE DATE OF THIS SRM.

i

<_.c Cg f af 4 5 A "

m m.,_ ;

?.I 9706100104 970605 1

PDR 10CFR PT9.7 PDR

i 4:

5 $'

1 1.

j lt2 In particular, the staff should explore the following areas to add clarity and consistency to the process.

l

,j

,r i

1.

The feasibility of assigning assurance levels for l

conformance to decision criteria.

l l

2.

The use of point values for comparisons with decision l

criteria, without any explicit consideration of uncertainty (i.e.,

how consideration of uncertainty j

should be explicitly considered in conjunction with 4

j using point values -- for example, use of probability limits) j i

The implications of small increases in core damage 3.

j j

frequency (CDF) and large early release frequency (LERF) codified in the guidance documents, as a j

function of the uncertainty associated with the FRA j

results.

4.

Codifying in the guidance documents the experience gained from the pilots to provide additional guidance on the " increased management attention" process when proposed changes approach the guidelines.

4 Clarifying the distinction between risk-informed and 5.

J risk-informed, performance-based regulatory approaches.

The staff should continue to pursue the long range goal of improving the overall quality and consistency of PRAs performed by different licensees by promoting high quality standards.

The staff should continue its efforts to complete, in a timely manner, the pilot applications of risk-informed regulation, and to complete the draft regulatory guidance and standard review plan for inservice inspection.

cc:

Chairman Jackson Commissioner Rogers Commission =r Dicus Commissioner Dia:

Commissioner McGaffigan OGC CIO CFO OCA OIG Office Directors, Regions, ACRS, ACNW, ASLEP (via E-Mail)

PDR DCS

-