ML19312B932

Forwards Proposed Tech Spec 3.6 Allowing Maint Intervals on Hatches & Isolation Valves for Short Periods of Time. Supercedes 740726 Request

ML19312B932
Person / Time
Site:	Oconee
Issue date:	09/04/1974
From:	Thies A DUKE POWER CO.
To:	Giambusso A US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML19312B933	List: ML19312B932 ML19312B937
References
NUDOCS 7911270722
Download: ML19312B932 (4)

Text

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AEC M W IEUTT0" FOR PAttT 50 LOCKET MA- 'TAL 9168

, (".._MPC MRY FCP) CCN"'ROL NO:

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FRCM: DATE OF DCC DATE REC'D LTR TWX RPT OTHER Duka Power Company Charlotte, N.C. 28201 Mr. A.C. Thies 9-4-74 9-6-74 X

~[O : ORIG CC OTHER SENT AEC PDR XXX A. Giambusso 3 sistned CiJ.SS UNCLASS PROP INFO INPUT SO CYS REC'D DOCKET NO:

XXX XXX 40  %-263270/287 DESC?.IPTION: ENCLOSURES:

Ler requesting a change to tech specs.....

csneerning..... maintenance intervals on hatches and isolation valves . . . . . . . . notarized 9-4-74 TACKNOWLEDGED m.a.r ;,.m . Oconee DO NOT REMOVE FCR ACTIC'.'/IN CIELiTIO'1 9-6-74 __ _ ,TR IUTIER(L) SCWENCER(L) ZI12MSN(L) REGAN(E)

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El in / D,. ~ %,, .l.D Mr. Angelo Giambusso /1, ' \c)

Deputy Director for Resc ur Projects . . PI ') 1.*

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U. S. Atomic Energy Commission .- w C ." J D f 4 .- W Washington, D. C. 20545 C -

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c^ u ...:a 3 Re: Oconee Nuclear Station d Docket Nos. -270, -287 -

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Dear Mr. Giambusso:

Oconee Nuclear Station Technical Specification 3.6 requires containment integrity be maintained when all three of the following conditions exist:

1. Reactor coolant pressure is 300 psig or greater

2. Reactor coolant temperature is 2000F or greater

3. Nuclear fuel is in the core Containment integrity, as defined in Section 1.7 of the Technical Specifications, exists when the following conditions are satisfied:

1. The equipment hatch is closed and sealed and both doors of the personnel hatch and emergency hatch are closed and sealed except as in 2 below.

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2. At least one door of the personnel hatch and the emergency hatch is I closeo and sealed during refueling or during personnel passage I through these hatches. l

3. All non-automatic containment isolatioa valves and blind flanges are closed as required.

4. All automatic containment isolation valves are operable or locked closed.

S. The containment leakage determined at the last testing interval satisfies Specification 4.4.1.

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Mr. Angelo Giambusso Page 2 September 4, 1974 )

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There is no provision undar the Technical SpecifiEations which will permit preventative or corrective maintenance to be pertormed on the personnel l or emergency hatches, or containment isolation valves during reactor  !

operation. Also, there is no prescribed action should these components become inoperable during reactor operation.

Pursuant to 10CFR50.59, it is requested that Technical Specification 3.6 be revised to allow maintenance intervals on hatches and isolation valves for short periods of time. The proposed changes are shown on the attached replacement pages for the Oconee Technical Specifications.

Operation with a personnel or emergency hatch inoperable does not impair containment integrity since either door meets the design specifications for structural integrity and leak rate. The time limits imposed permit completion of maintenance action and the performance of a local leak rate test when required or the orderly shutdown and cooldown of the reactor.

Timely corrective action for an inoperable containment is'olation valve is also specified.

This request for a revision to the Oconee Technical Specifications encompasses the change requested in my letter dated July 26, 1974.

Therefore, the request for change specified in that letter is hereby rescinded.

Very truly yours,

i n klfSWY A. C. Thies ACT:vr i

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Mr. Angelo Giambusso Page 3 September 4, 1974 A. C. THIES, being duly sworn, states that he is senior Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with the Atomic Energy Commission this request for amendment of the Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38, DPR-47, and DPR-55; and that all statements and matters set forth therein are true and correct to the best of his knowledge.

h(' lc A. C. Thies, Senior Vice President A1 TEST:

I e A, hn C. Goodman, J W /

sistant Secretary Subscribed and sworn to before me this 4th day of September, 1974.

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A a Notary Public l l

l My Conmission Expires: l

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