ML20064A943

Revised Response to NRC Re Violations Noted in Insp Rept 50-219/89-12.Spectacle Flanges Containing Testable O-ring to Allow Type B Testing Will Be Installed Adjacent to Butterfly Valves

ML20064A943
Person / Time
Site:	Oyster Creek
Issue date:	09/24/1990
From:	Fitzpatrick E GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9010030068
Download: ML20064A943 (2)

Text

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- Writer's Direct Dial Number:

September 24, 1990 U.S. Nucle.ar Regulatory Commission

' Attn Document Control Desk

' Washington,;DC =20555 Dear Sir

Subject:

Oyster-Creek Nuclear Generating Station Docket No. 50-219 Revised Response to Notice of Violation Inspection Report 89-12 By letter dated September 8, 1989, GPU Nuclear submitted the response to the Notice of Violation documented in Appendix A to NRC Inspection 50-219/89-12.

Example B in the' violation noted that four containment isolation valves were i

reverse direction tested and that adequate documentation for the acceptability ofLthe reverse! direction testing was not available, as required.

o GPU Nuclear: responded that:

1) 13 valves were being reverse ~ direction tested;

2) written justification for the reverse direction testing was com91eted for nine of the, valves; 3) an engineering evaluation was performed to demonstrate.

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. valve acceptability for the. remaining four globe valves; and 4) any, requisite i

modifications to these four valves would be completed prior to restart from-y refueling outage 13R.

-Subsequent to that submittal, extensive research and evaluation into valve j

E design. yielded new information.

Seven of the nine valves which were found l

acceptable =for reverse direction testing of the valve seat-(10CFR50 Appendix J,-Type C testing) were wafer seal butterfly valves.

This valve configuration has'an innermost seal which is only tested during a 10 CFR 50 Appendix J Type iL A test.

This innermost seal has been determined to be more appropriately i

1 classified as a-10'CFR 50 Appendix-J, Type B penetration.

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-t In order to test these new Type B penetrations, additional modifications will-J be required.

The most effective resolution would be the installation of spectacle flanges adjacert to the butterfly valves.- The soectacle flange twould contain.a testable O-ring to allow Type B testing. The existing flanges

_ provide a passive barrier to containment pressure in that no movement of i

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. mechanical parts is required to perform the boundary function.

Previous test 1

data of similar flangen has generally yielded acceptable leakage results.

In addition,~should a: butterfly valve flange connection be disassembled for any l

reason during 13R, the spectacle flange modification will be insta'. led and the 1

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Type B test performed prior to startup.

The four previously identified globe Ji

-valves will all be modified prior to restart from 14R rather than 13R as previously stated.

9010030060 900924 f

PDR ADOCK 05000219 0

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. Ov'10g GPU Nuclear Corporation is a subsidiary of General Public UtMties Corporation 7

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If there should'be any'further questions,.please contact Mr. John Rogers, at'

(609)971-4893.

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Very truly yours, f

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E.'

E.-Fitzpatrick Vice President and Director Oyster Creek f

EEF/JJR/dmd (JR-LTRS2:23) ocs Mr. Thomas T. Martin, Administrator

-Region 1I U.

S. Nuclear Regulatory Commission

~475 Allendale Road-i King of Prussia, PA 19406 Mr. Alexe.nder W. Dromerick U.S. Nuclear Regulatory Commission

' Mail Station Pl-137

-Washington, DC 20555 NRC Resident Inspectors 1

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