ML17037B849

Summary of Meeting with Mark II Owners, Sargent & Lundy, Bechtel, Stone & Webster, Burns & Roe, and the NRC Staff to Discuss Load Factors and Load Combinations Proposed by the Mark II Owners and Their Architect .

ML17037B849
Person / Time
Site:	Nine Mile Point, Susquehanna, Columbia, Limerick, LaSalle, Zimmer, Shoreham, Bailly  File:Long Island Lighting Company icon.png
Issue date:	08/23/1975
From:	Cutchin J Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
Download: ML17037B849 (18)

Text

t UNITED STATES NUCLEAR REGULATORY COMMISSIO WASHINGTON; O.

C. 20555 AUG 23 1975 Docket Nos. 50-322, 50-352

& 50-353, 50-358; 50-367, 50-373

& 50 50-387

& 50-388, 50-397, 50-CO APPLICANT:

Long Island Lighting Company, Philadelphia Electric Company, Cincinnati Gas

& Electric Company, Northern Indiana Public Service

Company, Commonwealth Edison

Company, Pennsylvania Power

& Light Company, Washington Public Power Supply System, Niagra Mohawk Power Corporation FACILITIES:

Shoreham Nuclear Power Station, Unit 1; Limerick Generating Station, Units '1

& 2; Wm. H. Zimmer Nuclear Power Station, Unit 1; Bailly Generating Station, Nuclear 1; LaSalle County Station, Units 1

& 2; Susquehanna Steam Electric Station, Units 1

& 2; WPPSS Nuclear Project No. 2; Nine Mile Point Nuclear Station, Unit 2

SUMMARY

OF MEETING HELD ON AUGUST 21, 1975 WITH MARK II OWNERS AND ARCHITECT-ENGINEERS On August 21, 1975 representatives of certain of the above named Mark II Owners, Sargent

& Lundy, Bechtel, Stone

& Webster, Burns

& Roe, and the NRC staff met in Bethesda, Maryland~

The primary purpose of the meeting was to discuss load factors and load combinations proposed by the Mark II Owners and their architect-engineers for assessing the capability of Mark II containment structures to accommodate safety/relief valve (SRV) loads (LOCA loads are still being evaluated by G. E. and were not to be discussed.)

An attendance list and copies of some of the tables and figures used in presentations made at the meeting are enclosed.

. Messrs.

Crawford and Bergstrom of Sargent

& Lundy made presentations.

Some of the ma)or points made were:

1.

The SRV load is a ma)or load which was not considered in the original design of Mark II containments.

2.

The SRV load has been added to the load combinations, and load factors associated with other loads in the load combinations are being reassessed (and reduced where possible to allow inclusion of the SRV loads without design modifications.)

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AUG 2 0 1975 3.

Present plans are to combine the SRV loads with the small-and intermediate-break LOCA loads but not with the large-break LOCA loads.

(GE is assessing the time sequences of the LOCA and SRV loads to see if the SRV and large-break LOCA loads should be combined.)

4.

Current philosophy is to include conservatism in the load rather than in the load factor.

Representatives of the NRC staff asked a number of questions, many of which cannot be answered until after the Preliminary Forcing Function Report is completed and design assessments are made of individual containment designs.

The Mark II owners were advised not to allow the schedule for submittal of required information to the NRC staff to begin to slip.

They were also advised that reductions in the margins presently included in the design of.the containments or in the conservatism presently included in the load factors and load combinations presented in their PSAR's could be viewed as modifications,to the principal architectural

-,and engineering criteria for design included in their PSAR's and necessitate amendment of their construction permits.

J.

M. Cutchin IV Light Water Reactors Branch 1-2 Division of Reactor Licensing

Enclosures:

As stated

ENCLOSURE 1 Attendance List Meeting with Mark II Owners

& Architect-Engineer Room 6507 Maryland National Bank August 21, 1975 NRC Sar ent

& Lund Stone

& Webster J.

M. Cutchin IV Isa Sihweil L. C.

Shao S.

Hou F. P. Schauer C. P.

Tan A. L. Gluckmann R. J. Stuart C, Grimes M. D. Lynch R. N, Bergstrom Ray Crawford Adolf Walser L. C. Dawson Donald J. Heesen Fabian Kovensky Commonwealth Edison Brent Shelton Pa.

Power

& Li ht.

W. E. Barberich Bechtel J.

R. Schmiedel George Katanics Lon Island Li htin Phila. Electric Co.

GPPSS Joseph P. Navarro John M. Madara G. L. Gelhaus Burns

& Roe G. S.

J.

Forman B. Bedrosian K. Ronis B. Roger A. R. Smith

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Aueusv 21, 1975 CONTAINNENT LINER CRITERIA ACCEPTANCE CRITERIA FOR NECHANICAL LOADS IN ACCORDANCE MITH ASNE BOILER PRESSURE VESSEL CODE SECTION III, DIVISION j., SUBSECTION NE

-ACCEPTANCE CRITERIA FOR SELFLIf'1ITING LOADS

• IN ACCORDANCE WITH ASHE BOILER PRESSURE VESSEL CODE SECTION III, DIVISION 2, SUBSECTION CC

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(Meeting Summary)

Distribution Docket File NRC PDR Local PDR NRR Reading:

V. A. Moore R.

C. DeYoung D. Skovholt D. Muller-R. Denise W. Butler J. Stolz R. Clark T. Speis D. Vassallo K. Kniel K.. Goller A. Schwencer P. Collins R. Purple D. Ziemann G. Knighton G. Dicker B. Youngblood W. Regan S. Varga R.

W. Klecker R. Heineman H. Denton R. Tedesco R. Maccary V. Stello B. Grimes M. Spangler R. Ballard Jacob Kastner R.

S.

Boyd W.'ammill V. Benaroya R. Vollmer J. Collins G. Lainas J. Knight S. Pawlicki L. Shao T. Ippolito R. Houston T. Novak D. Ross EP Prospect Manager

Attorney, OELD IE (3)

M Rushbrook R. Fraley (16)

0. Parr G..Lear LWR 1-2 File P.

Reihm I. Pelter I. Villalva R. Powell W. Kane J. knell J. M.'utchin IV Isa Sihweil L. C.

Shao S.

Hon F. P.

Schauer C. P.

Tan A. L. Gluckmann R. J. Stuar't

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