ML19329B620

Forwards Suppl 1 to SER by Containment Sys Branch.Design of Containment Subcompartments & Secondary Functional Design Acceptable.W/O Encl

ML19329B620
Person / Time
Site:	Davis Besse
Issue date:	02/14/1977
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Vassallo D Office of Nuclear Reactor Regulation
References
NUDOCS 8002050737
Download: ML19329B620 (2)

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DISTRIBUTION:

'N Docket Files 3

FEB 11 EU NRR Reading CSB Reading PS Reading Docket tio. 50-346 ME10PWiDUM FOR:

D. Vassallo, Assistant Director for Light Water Reactors, DP.'i FR0ti:

R. Tedesco, Assistant Director for Plant Systems, DSS

SUBJECT:

FIRST SUPPLE 4E:IT TO T;iE SAFETY EVALUATI0ii REPORT FOR DAVIS BESSE U:iIT 1 Plant ilame: Davis Besse iluclear Power Station, Unit 1 Docket iunber:

50-346 Licensing Stage: OL iSSS Supplier: Babcock and Wilcox Containment Type:

Dual Architect Engineer: Bechtel Responsible 3 ranch and Project Mar.ager: LWR-4; L. Eagle Review Status: Conplete Requested Completion Date: !!/S Applicant's Response Date: ti/S Enclosed is Supplement 1 to tne Safety Evaluation Report for the Davis Besse ;!uclear Pcwer Station, Unit 1, prepared by the Caatainment Systems Branen. The applicant has provided additional infor7ation since tr issuance of the Safety Evaluation Report, dated December 137G, in Revision 25 to the Final Safety Analysis Report.

In addition, tae Mechanical Engineering Branca nas accepted the ::ostulated not leg pipe rupture for the reactor cavity analysis. Based on our revied of tnis infomation, we conclude tnat the design of che contaix. cat subcon::artments and the secondary containment functional design are acceptacle.

Tne environmental qualifications of safety related e:ui;.nent following a main steam line

• reak accident will be handlea on a Seneric basis.

If a

probleras develop regarding environmental qualification for other Ca:: cock and Wilcox plants, for exarnple Davis Cesse Uniis 2 and 3, the nain stca.,

line break accident will be repenes on Davis Besse Unit 1.

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D. Vassallo 3 I f T'7 There are no cutstanding areas of review in Section 6.2 of the Davis Besse Unit 1 Safety Evaluation Report.

Pending resolution of the generic environmental qualification study for tne main stean line break accident, this concludes the Containment Systems Branch review of tne Davis Besse l'uclear Power Station, Unit 1.

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,c, Robert L. Tedesco, Assistant Director for Plant Systems Division of Systems Safety

Enclosure:

As Stated cc:

S. Hanauer R. tieineman R. Boyd W. Mcdonald S. Varga G. Lainas L. Engle J. Kudrick J. Shapaker J. Glynn D. Pickett Z. Rosztoczy R. Bosnak File: Davis Besse Unit 1 D**%

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