ML20151B222

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Responds to Request for Input Re Util 790403 Proposal for Use of 24-inch Ball Valve for Main Steam Isolation. Applicant Should Proceed W/Procurements & Installation.Valve Integrity Can Be Ascertained by Inservice Insp & Testing
ML20151B222
Person / Time
Site: Nine Mile Point, 05000000
Issue date: 11/10/1980
From: Check P
Office of Nuclear Reactor Regulation
To: Tedesco R
Office of Nuclear Reactor Regulation
Shared Package
ML20150F672 List:
References
FOIA-88-356 NUDOCS 8011200491
Download: ML20151B222 (2)
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OMTRIBUTION:

v60CKET FILE ASB READING NOV 101980 "

y PCheck b l i '

(Docket No. 50-410 Q .

Robert L. Tedesco. Assistant Director fj;$.d h$ G k:

, MEm RANDUM FOR: M for Licensing. 00L f; ' *,:

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i -: 1 FROM: Paul S. Check. Ass,1stant Director y g s for Plant Systess. DS!

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SUBJECT:

N!NE MILE POINT LMIT 4 MAIN STEAM .150LAT!0N RALVES The Nine Mi&4 Point Unit 2 Project Manager. Ken Kiper. requested the Auxiliary ,

Systems Branch to trovide an input for use in responding to Niagara Mohawk's '

letter of Septenber 8.1980. In that letter the applicant referenced their earlier letter of April 3.1979. in which it wss proposed that for Unit 2.

a 24-inch ball valve be used er sein steam isolation. .The 24-inch ball valve is designed and manufactund by the Gulf an'd Westem Manufacturing Company.

In their Septerber 8,1980 letter. Niagara Mohawk stated that no main steam isolation valve leakage control system is necessary with the Gulf and Western j valve. The applicant requested that the staff review Gulf and Westem's ,

Topical Report. "Main Steam Valve No. G&W - ESD 2538" by December 31, 1980, inoorder to allow them to maintain their engineering and construction schedule.

Regarding the Gulf and Western topical report. the Equipment Qualification'  ;

Branch has the lead responsibility for that review. We have discussed the j review with Z. Roszteczy, and he indicated that his branch is already comitted j until next spring on rere urgent. matters. Therefore, the topical report  ;

cannot be reviewed on a schedule which would be compatible with tha appli- ,

cant's request, i With regards to the applicant's eliminating the leakage control system.

Regulatory Guide 1.96 Revision 1. "Design of Main Steam IsolationkValve 1

Leakage Control Systems for boiling Water Reactor Nuclear Powgr Plants."  ;

lists Nine Mile 2 as a Section D.2 plants. Section D.2 recomends (assming ,

that standardsMStYs will be installed) that applicants install a supple- l 1 mental leakage control system. Nikgara Mohawk's argment for the leakage I control system not being needed is that the Gulf and Western valve provides '

a positive seal utilizing "unique dual floading see " i l

Contact:

0. Parr .

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Robert L. Tedesco ,

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. 1 j l Af ter reviewing Niagara Mohawk's requests, we see no problem with the appli.

cant proceeding with the procurement and installation of the Gulf and l Westem valves. We believe that the integrity of the valves L r be ascer- t tained by strict inservice inspection and testing requirements. The l 1eskagt requirements should be checked with the same frequency as with a  ;

leakage contml systan. If the leakage requirements are exceeded or if our -

later review of the topical report discloses problems. then the valves may require repair, modification or replacement. Further. the applicant should I I

be advised to reserve space and containment penetrations should the addition of a lagkage control system become necessary.  ;

. . ....n. ped bz l Paul S. Check .,,. ' '

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. Paul S. Check. Assistant Director for Plant Systems -

Division of Systems Integration i cc: D. Ross D. Eisenhut 8

B. Youngblood

7. Rosztoczy O. Parr K. Kiper I V. Leung  ;

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