ML19275G918

Discusses Util Investigation of Feasibility of Using Operator Actions or Design Mods to Mitigate Consequences of Small Loca.Requests Util Submit Small Break Spectrum Analysis Describing Assumptions Re Operator Action

ML19275G918
Person / Time
Site:	Midland
Issue date:	06/26/1978
From:	Mazetis G Office of Nuclear Reactor Regulation
To:	Hood D Office of Nuclear Reactor Regulation
Shared Package
ML111090060	List: ML19208A315 ML19208A325 ML19250B014 ML19250B445 ML19250B480 ML19250B482 ML19254C975 ML19254G119 ML19254G128 ML19255K396 ML19255K397 ML19257E274 ML19257F047 ML19257F050 ML19260B823 ML19260E912 ML19260E913 ML19260E914 ML19261C469 ML19262E467 ML19262F230 ML19263D836 ML19263F605 ML19263G068 ML19268C086 ML19268C087 ML19269F130 ML19271A085 ML19271A172 ML19273B051 ML19273D308 ML19274A409 ML19274E085 ML19275B428 ML19275B444 ML19275C327 ML19275C328 ML19275G904 ML19275G918 ML19275H308 ML19275H317 ML19275H339 ML19275H341 ML19275H375 ML19275H401 ML19275H405 ML19275H493 ML19275H655 ML19275H660 ML19276D594 ... further results
References
FOIA-80-515, FOIA-80-555 NUDOCS 8006200872
Download: ML19275G918 (1)

Text

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JUN 2 6 378 G.Mazetis Docket.Nos. 50-329/330 Ntwberry chron MEMORANDUM FOR: Darl flood, LpH, Light Water Reactors Branen No. 4, DPM THRU:

T. M. Novak. Chief, Reactor Systems Branch, DSS FROM:

G. R. Mazetis, Section laader, Reactor Systems Branch, DSS

SUBJECT:

MIDLAND UNIYS 1 AND 2 SMALL BREAK ANALYSIS

REFERENCE:

1:

Letter from S. !!. Howell (Consumers Power Company) to i

-J. G. Keppler (HRC) fated May 12. 1978.

Reference 1 is an interim report of the B&W 177 FA Lowered Loop plant small break problem as applicable to the Midland plant.

This report states that Consumers Power is investigating the feasibility of using operator action or design rcodifications to mitigate the consequences of a small LOCA, and that they will provide another interim report by July 21, 1978.

Receipt of an analysis on this date may not allow sufficient time for review prior to the current Second Round question deadline of August 4,1978. A particular concern in this area is the necessity for, and the time available for, operator action.

It is our desire to minimize any reliance on the operator to align the IIPI system following a small break. Accordingly, we expect the applicant to explore alternative design features which could preclude the need for operator actions, particularly outside the control room. Also, we would expect the applicant to submit or re'.arence an approved small break spectram analysis, using an approved evaluation codel, which fully describes their assumptions regarding operator action. When available, a draft of these analyses would help RSB expedite the Midland ECCS review.

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Gerald R. Nazetis, Section Leader

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