ML20125A477

Informs That Addl Info Needed in Order to Continue Review of NEDO-20846 Concerning ATWS Submittal.Applicant Should Submit Description of Mods & Schedule for Implementation

ML20125A477
Person / Time
Site:	Monticello
Issue date:	08/01/1975
From:	Stello V Office of Nuclear Reactor Regulation
To:	Goller K Office of Nuclear Reactor Regulation
Shared Package
ML20125A480	List: ML20125A477 ML20125A483
References
NUDOCS 9212080361
Download: ML20125A477 (2)

Text

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e@@KET FILE AUG 01 1915 NRR READING FILE

; V. STELLO l j P, FLING Docket No. 50-263 l

Karl R. Coller, Assistant Director for Operating heactors, 2 RL j REVIEW OF NEDO-20846, MONTICELLO ATWS SUBMITTAL Report

Title:

HEDO-20846, " Anticipated Transients Without Scram '

! Study for the Monticello Generating Plant"

! Docket No. 50-263 5

l Originating Branch and Project Manager: ORB-2, B. Buckley

, Technical Review Branch Involved: Reactor Systems Branch

- Description of Review: First Round Questions Review Status: Awaiting Information In order that we may continue our review of the subject topical, l additional information is requested. However, tbs analysis sub-mitted included the effects of several plant modifications even i

though with the letter of April 1,1975, the applicant has not agreed to implement these changes. In the last sentence of I this letter NSP stated, "...we do not believe backfitting of j  ! Monticello is presently warranted." However, the staff witnese stated at the Monticello hearing on May 7, 1975 (page 1141

~

j through 1143 of the hearing transcript), .. based on the infor-mation available to the staff today, we believe that-the conse-quences of an ATWS.. event at the Monticello facility is such that

, given the probability of occurrence of this event at this facility, steps should be taken to relieve the probability or the consequences

of this event," and " Clearly the last sentence in the letter of i April 1,1975 does not agree with the present Regulatory staff position that backfitting is required. For the Nonticello facility,

, in my opinion." Therefore, the applicant should submit a description i of these modifications and'a schedule for. implementation.

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i Ep5UMAY

, Tietor Sh!!o l ,

Victor Stello, Jr., Assistant Director i for Reactor Safety Division of Technical Review

Enclosure:

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