ML20129G996

Responds to GL 96-06, Assurance of Equipment Operability & Containment Integrity During Design Basis Accident Conditions

ML20129G996
Person / Time
Site:	Maine Yankee
Issue date:	10/24/1996
From:	Whittier G Maine Yankee
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GDW-96-74, GL-96-06, GL-96-6, MN-96-156, NUDOCS 9610300315
Download: ML20129G996 (2)

Text

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MaineYankee d

RE LI ABL E E LECTRICITY SINCE 1972

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329 Bath Road G. Douglas Whittier Brunswick, Maine 04011 r

Vice President Licensing & Engineering October 24,1996 (207p98-4100 MN-96-156 GDW-96-74 i

UNITED STATES NUCLEAR REGULATORY COMMISSION Attention: Document Control Desk Washington DC 20555

References:

(a) - License No. DPR-36 (Docket No. 50-309)

(b) NRC Generic Letter 96-06: Assurance of Equipment Operability and Containment Integrity During Design Basis Accident Conditions.

(c) Letter: J. R. Hebert to USNRC;" Maine Yankee Licensee Event Report 96-022, Containment Primary Component Piping Design Inadequacy Due to Lack of Thermal Relief Valves"; dated August 19,1996; MN 96-119.

Subject:

Assurance of Equipment Operability and Containment Integrity During Design Basis Accident Conditions Gentlemen:

Generic Letter 96-% requested that licensees determine: (1) if containment air cooler cooling water systems are susceptible to either water I.ammer or two phase flow conditions during postulated accident conditions, and (2) if piping systems that penetrate the containment are susceptible to thermal expansion of fluid so that over pressurization of piping could occur.

A.

Within 120 days of the date of the Generic Letter (October 9,1996) addressees are requested j

to submit a written summary stating actions taken in response to the requested information noted above, conclusions that were reached relative to susceptibility for water hammer and two

. phase flow in the containment air cooling water system and over pressurization of piping that penetrates the containment, the basis for continued operability of the affected systems and components as applicable, and corrective actions that were implemented or are planned to be implemented. If systems are found to be susceptible to the conditions that are discussed in the generic letter, identify the systems affected and describe the specific circumstances involved.

B.

Within 30 days of the date of the generic letter, addressees are requiree to submit a written response indicating (1) whether or not the requested actions will be completed, (2) whether or not the requested information will be submitted and (3) whether or not the requested information will be submitted within the requested time period.

Maine Yankee offers the following in response to the 30 day action item B:

(1) Maine Yankee plans to complete the actions requested in the generic letter identified as action J

item A above, t

i 9610300315 961024 yDR ADOCK 05000309 PDR

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MaineYankee l

UNITED STATES NUCLEAR REGULATORY COMMISSION MN-96-156 Attention Document Control Desk Page Two l

(2) Maine Yankee plans to submit the requested information including:

A summary report stating actions taken in response to the requested actions, a.

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b. Conclusions relative to the susceptibility of water hammer or two phase flow in the containment air cooler cooling water system and over pressurization of piping that penetrates the containment,

c. The basis for continued operability of affected systems and components, as applicable,

d. Corrective actions that viere implemented or are planned to be implemented, and 1 -

e. A description of affected systems and specific circumstances involved, as applicable, i

i (3) Maine Yankee plans to submit the requested information within the requested time period.

We trust this information is satisfactory. Please contact us should you have any questions in the i

matter, i

Very truly yours, b

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G. D. Whittier, Vice President Licensing and Engineering I

i c:

Mr. Hubert Miller l

Mr. J. T. Yerokun j

Mr. Daniel Dorman Mr. Patrick Dostie Mr. Uldis Vanags STATE OF MAINE Then personally appeared before me, G. D. Whittier, who being duly swom did state that he is Vice President, Licensing & Engineering of Maine Yankee Atomic Power Company, that he is duly authorized to execute and file the foregoing response in the name and on behalf of Maine Yankee Atomic Power Company, and that the statements therein are true to the best of his knowledge and 1

belief.

1 i

Mrs/_

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N[tary Public Monica W. Fortior, Notary Pu6ffd Stato of Maino My Commic0!cn Expiros 5/3/98