ML20005A508

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Responds to NRC 810330 Ltr Re Ultimate Capacity Analysis of Mark III Containments.Util Will Initiate Program to Determine Static Pressure Retaining Capacity of Containment. Results Will Be Submitted by 820301
ML20005A508
Person / Time
Site: River Bend  Entergy icon.png
Issue date: 06/22/1981
From: Draper E
GULF STATES UTILITIES CO.
To: Tedesco R
Office of Nuclear Reactor Regulation
References
RBG-10-606, NUDOCS 8106300407
Download: ML20005A508 (2)


Text

o GULF STATES UTILITIES COMPANY post oF86CE8o4 295!

  • 9EAUMoNT TEXAS 77704 AREA CoOE 713 839 3643 June 22, 1981

~*ll' RBG- 10,606 [- 9 File No. 09.5 -

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  • Mr. Robert L. Tedesco N \ -

f '9 \cSC;I,. C Assistant Director for Licensing o U. S. Nuclear Regulatory Commission !g Division of Licensing

,O ppi g Y Washington, D. C. 20555 p'Qo /

Dear Mr. Tedesco:

n3 River Bend Station Units 1 and 2 Docket Nos. 50 h58 and 50 459 Ultimate Capacity Analysis Of Mark III Containments This 2.etter is in response to your March 30, 1981 letter con-cerning " Ultimate Capacity Analysis Of Mark III Containments."

An analysis of the effect of hydrogen concentrations in the containment in excess of the current 10 CFR 50.44 level has not been undertaken at this time. Currently the River Bend Station design relies on a dryvell-containment mixing system for near term mitigation and on the use of the hydrogen recombiners installed in the containment for lon6 term mitigation. The de-scription of these systems are given in Section 6.2.5 of the Final Safety Analysis Report. Also Section 6.2.1 indicates that the contairment design pressure is 15 psig.

At this time Gulf States Utilities vill initiate a program to determine the static pressure retaining capacity of the con-tainment.

Gulf Ste.tes Utilities has recently participated in several meetings with other BWR/6 Mark III Containment Owners for the purpose of exchanging information with regard to the proposed goo /

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rulemaking concerning interim requirements related to hydrogen control and certain degraded core considerations (h5 FR 65h66).

A second program aimed at mitigating containment hydrogen concentrations resulting from a 757. metal-water reacticn is being discussed at this time.

The results of our static determination and a status of our dynamic program vill be provided to you by March 1, 1982.

Sincerely, E. L. Draper, Jr Vice President Iluelear Technology ELD /RJK/kt e

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