ML17244A214

In Response to All Fuel Assemblies May Be Removed from Reactor Vessel 15 Days After Shutdown Per Existing Tech Specs.Refueling Should Proceed So Reactor Vessel Inspec Can Be Accomplished

ML17244A214
Person / Time
Site:	Ginna
Issue date:	11/27/1978
From:	Ziemann D Office of Nuclear Reactor Regulation
To:	White L ROCHESTER GAS & ELECTRIC CORP.
References
NUDOCS 7812070028
Download: ML17244A214 (5)

Text

0 Docket No. 50-244 Rochester Gas 5 Electric Corporation ATTN:

Hr. Leon D. White. Jr, Vice President Electric and Steam Production 89 East Avenue Rochester, New York 14649 Gentlemen:

By letter dated August 3, 1978, Rochester Gas 5 Electric Corporation (RGEE) requested our approval to employ the existing spent fuel pool cooling system when the full core is temporarily removed from the reactor vessel and stored in the Ginna spent fuel pool in the early Spring Of 1979.

tte have previously reviewed and approved the spent, fuel cooling system for the R. E. Ginna spent fuel pool (Amendment No.

11 to Provisional Operating License No. DPR-18 dated t/ovember 15, 1976).

One of the technical specification changes authorized by that amendment limited the spent fuel water temperature to 150'F because if spent fuel pool cooling is lost with water temperature at 150'F, there is sufficient time before reaching the design temperature (180'F) to provide back up cooling.

The pool structural integr ity was analyzed at 180'F.

The RGSE submittal dated January 30, 1976, plus supplements dated Nay 19, June 3, August 5, and September 29, 1976 and our safety evaluation supporting Amendment Ho'. ll were based on the assumption that spent fuel pool cooling water from Lake Ontario is 80'F.

In these submittals RGSE and NRC concluded that the heat exchanger design was capable of removing 5.3x106'TU/hr when spent fuel pool temperature was 120'F or 9.3x106 BTU/hr when spent fuel pool temperature was 150'F. It was noted that:

I o

The service water drawn from Lake Ontario has not exceeded 80'F since the plant became operational in 1969.

o A typical refueling involves replacenent of the most depleted fuel elements (about one third of the 121 fuel assemblies in the core) 15 days or more after reactor shutdown will result in spent fuel pool heat removal rates less than the calculated cooling system capability of 5.3xl06 BTU/hr.

o Transfer of all fuel assemblies from the reactor vessel to the spent fuel pool thirty days or more after reactor shutdown will result in spent fuel pool cooling rates within the calculated cooling system capability of 9.3xl06 BTU/hr.

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Rochester Gas

& Electric Corporation NOV 8 p ]978 If nll fuel assemblies are transferred from the reactor vessel to the spent fuel pool fifteen days or more after reactor

shutdown, we agree with RG&E that the heat removal requirements of the spent fuel cooling system are less than 12x106 BTU/hr and that the calculated spent fuel pool cooling capability exceeds this value whenever the service water temperature (Lake Ontario) fs less than 60'F, On this basks, t/te conclude that the planned removal of all the fuel assemblies is acceptable and may proceed as described by RG&E with dependence on Lake Ontario temperntur es.

Me further conclude that this action is consistent wfth the intent and current limits of the technical specifi-cations for the R.

E. Ginnn plant and therefore no-change to the technical specifications are required.

RG&E has stated that a portable pump fs available and could be connected within 1 1/2 hours if the spent fuel pool cooling system pump becomes inoperable.

Also, if the spent fuel pool cooling system heat exchanger becomes inoperable adequate pool cooling can be provided within 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> by connecting up one of the component cooling heat exchangers.

During a telephone conversation with the RG&E licensing representative on October 27, 1978, the licensee's plans for providing additional spent fuel pool cooling capacity for the scheduled March 1979 cor e off load were discussed, The additional system will be operated in parallel with the existing spent fuel pool cooling system.

It is expected that wfth both pool cooling systems operating pool water temperatures will be well below the technical specification limits since either the existing or the temporary system will be capable according to the calculations of removing sufficient heat from the spent fuel pool, ff take water temperature fs below 60'F so that the spent fuel pool ~+ter temperature remains within the current technical specification limits, 01Lgillal Q;I',",.

3)ennis I,. gie~-.

On the basis of the above we conclude that all of the fuel assemblies may be removed from the reactor vessel fn accordance with the existing technical specifications nnd that your plans for removing fuel assemblies about 16 days after shutdown for refueling should proceed so that reactor vessel inspection may be accomplished in accordance with the fnservice surveillance requirements, D

ocket(50-244 Sfncer ely, NRC I'D OELD Local PDR OI&E(3)

ORB82 RDG DEisenhut VStello TERA Dennfs L. Zfemann, Chief DLZiemann ACRS(16)

Operatfng Reactors Branch 82 JShea

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Date:

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License Fee Hanagement

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Amende~orm Date:

,age FACILITY AHENDHENT CLASSIFICATION -

DOCKET NO(S).

C= t-Pla~t Name and Unit(s):

License No(s):

Hail Control No:

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Request Dated:

Fee Remitted:

Yes Assigned TAC No:

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Licensee's Fee Classification:

Class I

, II

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M l Date of Issuance

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No~

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This request has been reviewed by DDR/DPII in accordance with Section 170.22 of Part 170 and is properly categorized.

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This request is incorrectly classified and should be pr'operly categoriz c's C ass~

Justification for classific'ation or reclassification.

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3. 'A'dditional infer ation is re uired F properly categorize the request:

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two'Wg 4.. This request is a Class type of action and is, exempt from fees because it:

(a) 'as filed by a nonprofit educational institution; (b) was filed by a Government agency and is not for a power reactor, (c) is for a Class (can only be a I, II, or III) amendment v(hich results from a.written Commission request dated for the application and the amendment is to simplify or clarify license or technical specifications, has only minor safety significance, and is being issued for the convenience of the Commission, or

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The above request has been reviewed and is exempt from fees.

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Mil am 0. Hiller, Chief Date LFNB 6/78

(~+Pbicense Fee Nanagemcn-Branch

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Rochester Gas 8 'Electric Corporation CC Lex K. Larson, Esquire

LeBoeuf, Lamb, Leiby 8 HacRae 1757 N Street, N.

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Washington, D.

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20036 Hr. Hichael Slade 1250 Crown Point Drive

Webster, New York 14580 Rochester Committee for Scientific Information Robert E.

Lee, Ph.D, P. 0.

Box 5236 River Campus Station Rochester, New Yor k 14627 rh'ovember 27, 1,978 Jeffrey Cohen New York State Energy Office Swan Street, Building Core 1, Second Floor E'mpire State Plaza

Albany, New York 12223 Director, Technical Development Programs State of New York Energy Office Agency Building 2 Empire State Plaza

Albany, New York 12223 Rochester Public Library

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115 South Avenue Rochester, New York 14627