ML20097F666

Forwards Revised Response to 840727 Submittal Re Draft SER Open Items 5c,28f,32 & 33. Hope Creek Generating Station Extreme Event Site Flooding... & Analysis of Likelihood of Waterborne Traffic... Also Forwarded

ML20097F666
Person / Time
Site:	Hope Creek
Issue date:	09/17/1984
From:	Mittl R Public Service Enterprise Group
To:	Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML20097F667	List: ML20097F666 ML20097F690 ML20097F699
References
NUDOCS 8409190067
Download: ML20097F666 (4)

Text

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FuCc Serwce O Pk G Company Ekxtrc ard Gas 80 Park Plaza, Newark, NJ 07101/ 201430 8217 MAILING ADDRESS / P.O. Box 570, Newark, N J 07101 Robert L. Mitti General Manager Nuclear Assurance and Regulation September 17, 1984 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, MD 20814 Attention: Mr. Albert Schwencer, Chief Licensing Branch 2 Division of Licensing Gentlemen:

HOPE CREEK GENERATING STATION DOCKET NO. 50-354 FLOATING MISSILES SUPPLEMENTAL INFORMATION On July 27, 1984, Public Service Electric and Gas Company (PSE&G) submitted technical information addressing Draft Safety Evaluation Report (DSER)

Open Item Nos. Sc, 28f, 32, and 33. On July 31, 1984 representatives of PSE&G met with representatives of the NRC Staff to discuss the material submitted. During that meeting, the Staff raised various questions on the analyses perfomed. Attached is a response to these questions in the form of a revision to our July 27, 1984 submittal.

Should you have any questions or require any additional information on this item, please contact us.

Very truly yours, 8409190067 840917 PDR ADOCK 05000354 k h E PDR C D. IL Wagner (w/5 sets of attach.)

USNRC Licensing Project Manager W. H. Bateman (w/ response only)

USNRC Senior Resident Inspector N ore .'

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g,pe es au W 9J45 At%ch'd 3o gool The Energy People

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^ Director of Muclear Reactor. Regulation ,

9/17/84 BC' General Manager - Engineering (w/ response only)

General Manager - Hope Creek Operations (w/ response only)

Project Manager - llope Creek (w/ response only)

Manager - Licensing and Analysis (w/ response only)

Manager - Nuclear Licensing and Regulation (w/ response only)

Chief project Engineer - Hope Creek Associate General Solicitor B.;G..Markowitz - Bechtel Power Corp. (w/ attach.)

4 Conner s Wetterhahn (w/ attach.)

R. Green - N.J. State Bureau of Radiation Protection (w/ response only)

R. F. Yewdall (w/ attach.)

A. S. Kao (w/ attach.)

J. Dette, Dames & Moore (w/ attach.)

A. Kaleikar, A. D. Little (w/ attach.)

M. E. Smith, MES (w/ attach.)

MAR Department - File'(yellow) (w/ attach.)

J. Ashley - Bethesda Office (w/ attach.)

CARMS (w/o attach.)

Licensing File - NRC Letters (w/ attach.)

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HOPE CREEK GENERATING STATION DSER OPEN ITEM NO. Sc (Section 2.4.5)~

Probable Maximum Surge and Seiche Flooding As indicated in Section 2.4.1, the applicant states that all accesses to safety-related structures (doors and hatches) are provided with water tight seals designed to withstand the head of water associated with the flood protection levels. But, the applicant has not indicated whether the water tight doors are designed to withstand either the combined loading effects of both static water level and the dynamic wave impact or, as cited in S9ctions 3.4.1 and 3.5.1.4 of this report, the impact of a barge propelled by winds and waves associated with a hydrologic event that floods plant grade.

DSER OPEN ITEM NO. 28f (Section 3.4.1) i The applicant has not addressed our concern associated with the structural integrity of the safety-related structures during the design basis flood and the effects of " floating" .

. missiles. Since the Delaware River is a navigable waterway with the refineries and naval shipyard in Philadelphia, the '

applicant must address the effects of ships and boats with a draft of less than 12 feet hitting the walls and penetrations ,

of safety-related structures. Some ships which do travel  ;

up and down the Delaware River and can have a draft of less  ;

than 12 feet are the " Newport" class LST's (LST-ll79 series), .

the "DeSoto County" class LST's (LST-ll73 series), the  !

" Anchorage" class LSD's (LSD-36 series), submarines (especially  ;

the non-nuclear power submarines), tug boats, visiting "American" ships from foreign countries, oil tankers (when i they are empty), and a large host of pleasure craft. ,

DSER OPEN ITEM NO. 32 (Section 3.5.1.4)

[ Based upon our review of the missile spectrum, we conclude l

that the spectrum was properly selected for tornado generated missiles but does not include " floating missiles" as part of the design basis flood and therefore does not meet the requirement of General Design Criteria 2 and 4 with respect to protection against natural phenomena and missiles.] The plant design does meet the guidelines of Regulatory Guides 1.76 and 1.117 with respect to identification of missiles generated by tornadoes and is, therefore, acceptable. [The missile spectrum does not meet the acceptance criteria of SRP Section 3.5.1.4. We will report resolution of this item in a supplement to this SER].

l RGV.l

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DSER OPEN ITEM NO. 33 (Section 3.5.2) '

The design of the facility for providing protection from externally generated missiles does not meet the applicable acceptance criteria of SRP Section 3.5.2 and the requirements of General Design Criteria 2 and 4 with respect to missile and environmental effects. We will report resolution of these items in a supplement to this SER.

RESPONSE TO DSER OPEN ITEMS NOS. Sc, 28f,.32 and 33 Attached is a report entitled "An Analysis of the Likelihood of Waterborne Traffic and Other Floating Objects on the Delaware River Impacting the Hope Creek Generating Station in Severe Storms" prepared by Arthur D. Little, Inc. for Hope Creek Generating Station. This report replaces in its entirety

.the report submitted on July 27, 1984 (letter from R. L. Mitti, PSE&G to A. Schwencer, NRC) prepared by Arthur D. Little.

Also attached is a report prepared by Meteorological Evaluation Services (.MES ) entitled " Hope Creek Generating Station - Extreme ..

Event Site Flooding - Supplemental Report on Meteorology -

August 1984" which is referenced in the Arthur D. Little Report.

This August 1984 MES report supplements information contained in a report entitled " Hope Creek Generating Station - Extreme Event Site Flooding Meteorology - July 1984" previously submitted on July 27, 1984 (letter from R. L. Mitti, PSE&G to A. Schwencer, NRC). The Arthur D. Little report also references a report prepared by Dames & Moore entitled " Storm Surge Calculations for Hope Creek Generating Station - July 1984" previously submitted on July 27, 1984 (letter from R. L. Mittl, PSE&G to A. Schwencer, NRC).

The reports demonstrate that the probability of marine vessels impacting Hope Creek Generating Station is significantly less than 10-6 per year. The 10-6 por year figure is referenced in Standard Review Plan Section 2.2.3 as an acceptable expected occurrence rate for an analysis if, when combined with reasonable qualitative arguments, the realistic probability can be shown to be lower. Based on the analyses performed, Public Service Electric and Gas Company concludes that the impact of " floating marine missiles" need not be considered in the design bases of Hope Creek Generating Station.

The reports also analyze the impact of non-marine " floating missiles" on doors for safety related structures. The results of this evaluation indicate that all the door structures are able to withstand the impact of the postulated non-marine

- floating missiles.

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