ML20210A316

Submits Summary of Safety/Relief Valve Operation for Period Jul 1970 - Dec 1973,in Response to Part 1 of

ML20210A316
Person / Time
Site:	Millstone, 05000000
Issue date:	01/21/1974
From:	Switzer D MILLSTONE POINT CO.
To:	Skovholt D US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20209J032	List: ML20209J028 ML20209J102 ML20209J362 ML20209J414 ML20209J428 ML20209J450 ML20209J504 ML20210A204 ML20210A316 ML20210A365 ML20210A410 ML20210A454 ML20210A522 ML20210A538 ML20210A585 ML20210A633 ML20210A720 ML20210B005 ML20210B037 ML20210B073 ML20210B140 ML20210B165 ML20210B193 ML20210B233 ML20210B262 ML20210B269 ML20210B312 ML20210B376 ML20210B424
References
FOIA-87-40 733, NUDOCS 8705050062
Download: ML20210A316 (2)

Text

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B MILLSTONG

. POINT COMPANY A NCRTHEAST UTruflES COvPANy HART CRO ONNECTICUT C6Gi 203-666-6911 January 21, 1974 p--~

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n Mr. Donald Skovholt /'

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Assistant Director for Operating Reactors i J/  ;

Directorate of Licensing '

Office of Regulation -

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U.S. Atomic Energy Commission 9

Washington, D. C. 20545 L- a ,7 -

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Dear Mr. Skovholt:

The enclosed summary of safety / relief (S/R) valve operation is forwarded in response to Part 1 of your letter of December 19, 1973.

July - December 1970 4m 6 .,1) 12-30 All three S/R valves were manually lifted with reactor pressure R at 980 psig during startup test program.

Januar/ - June 1971 4~n

1) 1-10 The A and B S/R valves lifted automatically during the startup 2 test program after an unscheduled MSIV closure.

2) 2-14 All three valves were manually lifted with reactor pressure at I 1000 psig; this was done as part of the startup test program.

3) 2-16 The C S/R valve was manually lifted with reactor pressure at i 1000 psig; held open for 30 seconds. Valve was weeping prior to manual lift and reseat.

4) 2-18 The C S/R valve was manually lifted with reactor pressure at i 1000 psig; held open for 30 seconds. Test was performed after completion of maintenance work on valve.

5) 3-28 The B S/R valve was manually lifted with reactor pressure at i 1000 psig; held open for 30 seconds.

6) 5-12 The A S/R valve was manually lifted for a few seconds with reactor ;

pressure at 1000 psig. Valve was lifted after fix of leak in air line to valve.

7) 5-31 The C S/R valve was manually lifted for 15 seconds with reactor pressure at 1000 psig. Valve was lifted to stop slow seat leakage.

8) 6-20 The C S/R valve was manually lifted for 15 seconds with reactor l pressure at 1000 psig to eliminate slight seat leakage. -

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July - December 1971 ( ,, , y

1) 9-20 The B and C S/R valves were manually lifted for 15 seconds with 2 reactor pressure at 1000 psig.

2) 10-10 The B S/R valve lifted at approximately 1040 psig and did not i reseat until approximately 260 psig; this was an uncontrolled blowdown.

8705050062 870428

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3) 10-22 The B S/R was manually lifted and reseated with reactor pressure I at 100 psig. Valve was noted leaking by seat on drywell inspection.

4) 10-25 All three S/R valves were manually lifted and reseated with --

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reactor pressure at 1000 psig. Test lift was conducted following valve maintenance.

5) 11-02 All three S/R valves were manually lifted and reseated with -

reactor pressure at 1000 psig. Valves were lifted in accordance with surveillance requirements of Technical Specifications. M January - June 1972 i y eo -

None .

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b July - December 1972 None January - June 1973

1) 3-04 All three S/R valves were automatically lifted with reactor at  :

100 psig. Valves were lifted to meet Technical Specification surveillance requirements after refuel outage.

July - December 1973

1) 9-22 All three S/R valves were manually lifted for 15 seconds with #

reactor pressure at 1000 psig. Valves were lifted to meet -r Technical Specification requirements when FWCI inoperable. '

Very truly yours, THE MILLSTONE POINT COMPANY

[Ob D. C. Switzer President DCS/smb

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