ML20128M684

Requests Approval of Encl Schedule for GESSAR-II Severe Accident Review.Proposed Schedule Would Delay Issuance of SER from 840301 to 840615.W/o Encl

ML20128M684
Person / Time
Site:	05000000, 05000447
Issue date:	11/07/1983
From:	Miraglia F Office of Nuclear Reactor Regulation
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20127A894	List: IA-85-110, Forwards Technical Papers from Eg&G,Idaho for ANS Meeting in Snowbird,Ut.W/O Encls ML20127A890 ML20127B539 ML20127B616 ML20127C187 ML20128M621 ML20128M642 ML20128M650 ML20128M656 ML20128M664 ML20128M670 ML20128M675 ML20128M679 ML20128M684 ML20128M693 ML20128M700 ML20128M705 ML20128M712 ML20128M723 ML20128M727 ML20128M731 ML20128M739 ML20128M746 ML20128M753 ML20128M760 ML20128M767 ML20128M774 ML20128M781 ML20128M788 ML20128M795 ML20128M798 ML20128M819 ML20128M839 ML20128M853 ML20128M883 ML20128M890 ML20128M918 ML20128M953 ML20128M973 ML20128M982 ML20128M990 ML20128N000 ML20128N011 ML20128N018 ML20128N023 ML20128N041 ML20128N046 ML20128N054 ML20128N064 ML20128N070 ... further results
References
FOIA-85-110 NUDOCS 8507120415
Download: ML20128M684 (3)

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1 MEMORANDUM FOR: Harold R. Denton, Director l Office of Nuclear Reactor Regulation '

THRU: Darrell G. Eisenhut, Director Division of Licensing FRDM: Frank J. Miraglia, Assistant Director~

for Safety Assessment Division of Licensing

SUBJECT:

RECOMMENDED SCHEDULE FOR GESSAR II SEVERE ACCIDENT REVIEW By memorandum dated June 24, 1983, a copy of which is enclosed, the Directors _

of the Divisions 'of Systens Integration, Engineering, and Safety Technology .

. proposed an approach and schedule for completing the GESSAR II severe accident review in a timely manner. The proposed approach would include two aspects of the review not previously considered when the original GESSAR II schedule was developed. Factored into the proposed review schedule would be the consideration of external events in the PRA and the use of the new source term presently being developed by the Accident Source Term Program Office (ASTPO).

At the EDO-GE meeting on September 23, 1983, the following points were made with regard to the GESSAR II severe accident review:

(1) the staff's review of the interral events portion (excluding the uncertainty analysis) of the GESSAR II PRA is largely -

complete. This review was based on the assumptions and methodologies consistent with an upgraded WASH-1400 type review.

(2) The EESSAR II review will be completed based on assumptions and methodologies which will be developed by the ASTP0 by December 31, 1983. The staff will no longer continue the review of GESSAR II using the assumptions and methodologies consistent _ with the upgraded WASH-1400 type review. , ,

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8507120415 850415 PDR FOIA PDR ALVAREZ85-110

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l Darrell G. Eisenhut l This approach clearly involves a number of risks: (a) the discontinuance of the old approach leaves the staff with no fallback analysis, and (b) the use of the new approach prior to peer review stands the chance of having to be redone after the peer review process is complete. It also gives the impression that we place very little significance on the peer review process. While we' recognize these risks could be significant, we understand that the Technical Review Divisions lack sufficient resources to do the review both ways (i.e.,

using the upgraded WASH-1400 type source term and the ASTP0 source tenn) and, therefore, propose to proceed only with the assumptions and methodologies developed by the ASTPO. Accordingly, we request your approval of the enciesed review schedule. ..

z It is important to note that the proposed schedule is predicated on the accep-tability of the external events PRA which GE submitted September 22,1983, and the associated uncertainty analysis which is due by December 31, 1983, and the availability to the staff of the revised ASTP0 source tem methodology by December 31, 1983. It is also important to note that the staff's Safety Evaluation Report is not scheduled to be issued until June 15, 1984, approxi-mately 51/2 months after the scheduled availability of the ASTP0 source tena, thereby providing a reasonable amount of overlap with the peer review process.

Should the ASTP0 source term change significantly as a result of the peer review process, the Safety Evaluation Report would be revised as appropriate.

Delays in these dates will have corresponding impacts on the review schedule.

The proposed schedule would delay the issuance of the SER from March 1 1984 to June 15, 1984, a period of 3 1/2 months.

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• Frank J. Miraglia, Assistant Director for Safety Assessment

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Division of Licensing ...__ _

Enclosures:

As stated Approved:

Harold R. Denton DISTRIBUTION:

Docket Files. R. Vollmer -

NRC PDR R. Mattson DCS F. Miraglia SSPB Reading C. Thomas D. Eisenhut D. Scaletti .

T. Speis A DL:D D: DST IT:DE D:DSI B

igjia DEisenhut TSpeis RVollmer, RMattson calettice s

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Document Name: -

/U #1; 9/20-A 3 Requestor's ID:

CHERRILL M /h w f9'777 / ,

Author's Name:

D. Scaletti Document Coments: '

] . 1 Memo to Denton - GESSAR II Schedule y A, y

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11/4/83 MEMORANDUM FOR: H. Denton I

SUBJECT:

RECOMMENDED SCHEDULE FDR GESSAR II SEVERE

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ACCIDENT REVIEW

1. D. Scaletti - concur Il [ U h

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2.- 6. inomas - concur gfgy7-lt 7 ?.

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4. T. Speis - concur

5. R. Mattson , concur

6. R. Vollmer - concur -

7. D. Eisenhut - concur * ,

8. H. Denton - Approval 4

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