ML20107F360
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UNITED STATES NUCLEAR REGULATORY COMMISSION W ASHINGTON. D. C. 20555 1
Docket No.
50-219 APR 1 7 1975 Jersey Central Power & Light Company gcy ATTN:
Hr. I. R. Finfrock, Jr.
Vice President - Generation Madison Avenue at Punch Bowl. Road-
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Horristown, New Jersey 07960 Gentlemen:
Pursuant to $50.54(f) of 10 CFR Part 50, the Nucleac. Regulatory Commission (NRC) staff requires that certain information related to the design of the
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containment for your facility be submitt.ed pr'omptly to NRC for its review.
This requirement results from recent developments associated with the large-scale BWR Hark III testing being conducted by the General Electric Company.
These tests indicate that suppression pool hydrodynamic loads during a loss-of-coolant accident (LOCA) should be considered in the
. detailed design of components and structure of the Mark III containment.
In ' addition, there appears to be a potential for the occurrence of i
similar dynamic loads on plants with a Mark I type of containment.
.Therefore, we require that you provide the information specified in concerning the. potential magnitude. of these hydrodynamic loads, and the effects of these loads, loads, on the design of your containmentin combination with ot,her design structures.
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,., specifies the information required ' to complete our review of the effect of pool dynamic loads on the design of your containment structures.. Enc 1,osure 2 contains background information on the status of efforts directed at determining pool dynamic loads.
- For, i
Beneral information,' we have also provided in Enclosure 3 a description of the various phenomena durios a postulatey LOCA which result in possible hydrodynamic loads.
Please note that certain key phrases i
in Enclosure 3 have been underlined.
These phrases (1) ide~ntify 'those specific hydrodynamic loads which, as a minimu n, should be considered,
in your rcriew of containr ent design, and (2) establish the standard nomenclature by which phenomena should be discussed or referenced in your documentation.
Your response to'the request should be filed within sixty days of the date of receipt of this letter.
If you cannot meet this schedule,
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please advise us within fif teen days.
'Ihe scheduling of work on this matter should parallel related efforts on other containment design /
operational control aspects, i.e., relief valve vent clearing and steam quench'ing vibration phenomena.
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dr. I. R. 'Finfrock, Jr. APR l ' 7 1975 Please. contact us if you desire additional discussion or clarification of the information requested.
l' Sincerely, f.T "0
gp George Lea, Chief Operatin~g Reactors Branch #3 i
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Division of Reactor Licensing
Enclosures:
- 1.. Required Information
===2.
Background===
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3.
Description of Potential j*
Pool Dynamic Phenomena
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'Ihis request for Generic Information was approved by CAO under a blanket Clearance No. B-180225 (R0072); this clearance expires July 31, 1977.
I cc:
w/ enclosures.
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'l G. F. Trowbridge, Esquire Paul Rosenberg, Esquire Shaw, Pittman, Potts, Trowbridge Daniel Rapporport, Esquire and Madden Barr Building 2323 S. Broad Sneet g,M,
Trenton, New Jersey 08610 910 17th Street, N. W. s Washington, D. C.
20006 Honorable Joseph W. Ferraro, Jr.
Jersey Cent.ral Power & Light Company Deputy Attorney General.
State of New Jersey ATTN:
Mr. '1horaas }!. Crittmins, Jr.
101 Commerce Street - Room 208, Safety and Licensing !!anager Newark, New Jersey O'7102 GPU Service Corporation 260 Cherry Hill Road Burtis W. Horner, Esquire Parsippany, New Jersey 07054 Stryker, Tams And Dill
' P; 55 Madison Avenue t
Anthony Z. Roisman, Esquire
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Berlin, Roisman & Kessler Horristown, New Jersey O'7960 l
1712 N Street, N. W.
Ocorge F. Kugler, Jr.
Washington, D. C.
20036 Attorney General Ocean County Library State of New Jersey State House Annex 15 llooper Avenue Trenton, New Jersey 08625 Toms River, New Jersey 08735 i
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