JPN-87-025, Responds to Generic Ltr 87-05, Request for Addl Info - Assessment of Licensee Measures to Mitigate &/Or Identify Potential Degradation of Mark I Drywells. W/11 Oversize Drawings

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Responds to Generic Ltr 87-05, Request for Addl Info - Assessment of Licensee Measures to Mitigate &/Or Identify Potential Degradation of Mark I Drywells. W/11 Oversize Drawings
ML20214D918
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 05/11/1987
From: Brons J
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20214D919 List:
References
GL-87-05, GL-87-5, JPN-87-025, JPN-87-25, NUDOCS 8705210537
Download: ML20214D918 (3)


Text

.e 123 Man Street Wtut.2 Plains, NewWrk 10301 914 681.6200

  1. > NewWrkPbwer 4# Authority May 11, 1987 JPN-87-025 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

Subject:

James A. FitzPatrick Nuclear Power Plant Docket No. 50-333 Response to Generic Letter 87-05 --- Potential Degradation of Mark I Drywells due to Water Leakage l

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Reference:

1. Generic Letter 87-05, " Request for additional information-assessment of licensee measures to mitigate and/or identify potential degradation of Mark I drywells, dated March 12, 1987.

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Dear Sir:

In Reference 1, the NRC requested information on measures to mitigate and/or identify potential degradation of Mark I drywells due to water leakage into the sand cushion surrounding the drywell.

In response to Reference 1, the Authority reviewed the design for the FitzPatrick plant sand cushion and refueling bellows drain systems. Copies of plant drawings are enclosed as Attachment 1 to this letter.

The results of this review indicate that the sand cushion for the FitzPatrick plant is covered with stainless steel plates with an adhesive seal to prevent in-leakage. Drains are provided above thece plates and also at the bottom of the sand cushion. Because of this design arrangement, no ultrasonic thickness measurements are required for the drywell shell plates adjacent to the sand cushion.

The attached drawings also show that all drain connections are wolded; therefore, there are no gasket inspections or maintenance required.

In a drain line for the outer refueling bellows, the Authority plans to install a flow indicator / switch which will alarm in the control room in the event of a bellows failure.

The Authority also confirms that the information listed in Table 1 of Reference 1 for the Fit 2 Patrick plant is correct, except that the comments section should read " Gaps sealed, drains shown".

Currently, the Authority does not inspect the sand cushion and bellows seal drains to assure that they are unplugged. The Authority will incpect these drain lines during the next refuel outage. .

1 8705210b37 B70511 0j$ .

PDR P

ADOCK 05000333 PDR I

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r 0 Should you or your staff have any questions regarding this matter, please contact Mr. J. A. Gray, Jr. of my staff.

Very truly yours, blM'.Brons Executive Vice President uclear Generation Encl.

cc: Office of the Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 136 Lycoming, New York 13093 U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Mr. Harvey Abelson Project Directorate I-1 Division of Reactor Projects-I/II U.S. !!uclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20014

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