ML20132B359

Responds to 961206 Telcon RAI Re TS Change Request 95-14-0. Surveillance Requirement Test Results,Encl

ML20132B359
Person / Time
Site:	Limerick
Issue date:	12/09/1996
From:	Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9612170163
Download: ML20132B359 (3)

Text

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. A 1 y 10 CFR 50.90 L

PECO NUCLEAR esco eme,9, cemnem, A Unit of PECO Energy 965 Chesterbrook Boulevard Wayne, PA 19087 5691 i December 9,1996 I

Docket Nos. 50-352 50-353 1

i License Nos. NPF-39 l'

} NPF-85

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U.S. Nuclear Regulatory Commission

ATTN: Document Control Desk 2

Washington, DC 20555 i

Subject:

Limerick Generating Station, Units 1 and 2

Technical Specifications Change Request No. 95-14-0 j

, Response to Request for Additional Information j k Gentlemen: i

(  ;

, By letter dated June 28,1996, PECO Energy Company submitted Limerick 1 Generating Station (LGS), Unit 1 and Unit 2, Technical Specifications (TS)

Change Request No. 95-14-0 that proposed adopting 10CFR 50, Appendix J,

Option B, performance based testing. By telephone conversation on December

6,1996, the NRC requested additional information involving TS Change Request No. 95-14-0. Spedfically, the NRC requested the test results pertaining to the i primary containment drywell-to-suppression chamber bypass leakage since i November 30,1993. The following provides the requested information.

f Since the November 30,1993, PECO Energy TS Change Request No. 93-07-0 letter, which requested that the primary containment drywell-to-suppression chamber bypass leak test coincide with the 10 CFR 50, Appendix J, Type A Test (i.e., containment integrated leakage rate test) interval, no Type A Tests have been required to be performed at either LGS unit; therefore, no bypass tests have been performed. However, TS Surveillance Requirement Specification 4.6.2.1.f requires performance of an alternate test (i.e., vacuum breaker leak test) during each refueling outage when the drywell-to-suppression chamber bypass test is not performed. The surveillance requirement test is conducted to ensure that the total vacuum breaker leakage area is less than or equal to 24% of the specified limit, and the leakage area for an individual set of vacuum breakers is less than or equal to 12% of the specified limit. Oc'D i\

9612170163 961209 n

'PDR ADOCK 05000352. I U P

PDR l

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. Dec mbar 9,1996  ;

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l7 The TS surveillance test results (since the November 30,1993, letter) are

provided below. Please note there is a difference in the percentage of the overall limit comparing the bypass test results contained in the November 30,1993 letter,

and the alternate test results (i.e., bypass test = 1.55% to 5.56% and vacuum 1

breaker test = 0.06% to 0.4%). This difference is due to inherent inaccuracies J involved with the bypass test (e.g., large volume, duration of test, and test j measurement points) compared to the vacuum breaker alternate test.

TS SR 4.6.2.1.f Results:

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1 Unit 1 - February 1994* Total area = 0.4% of specified limit i Largest individual set area = 0.1% of specified limit i

Unit 2 February 1995 Total area = 0.08% of specified limit i Largest individual set area = 0.04% of specified limit ,

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Unit 1 - February 1996 Total area = 0.06% of specified limit d

Largest individual set area = 0.03% of specified limit j

• The test equipment used prior to 1995 was less accurate than that which is currently used.

i This additional information is being submitted under affirmation and the associated affidavit is enclosed.

i If you have any questions, please do not hesitate to contact us.

i Very truly yours,

G. A. Hunger, Jr.

Director - Licensing

Enclosure l cc: H. J. Miller, Administrator, Region I, USNRC (w/ enclosure)

N. S. Perry, USNRC Senior Resident inspector, LGS (w/ enclosure) l R. R. Janati, PA Bureau of Radiation Protection (w/ enclosure) i 4

COMMONWEALTH OF PENNSYLVANIA  : .,

SS COUNTY OF CHESTER  :

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D. B. Fetters, being first duly sworn, deposes and says: that he is Vice President of PECO Energy Company, the Applicant herein; that he has read the enclosed additional l

information supporting Technical Specifications Change Request No. 95-14-0 " Adoption of Performance Based 10 CFR 50, Appendix J, Option B Testing," for Limerick Generating Station, Unit 1 and Unit 2, Facility Operating License Nos. NPF-39 and NPF-l 85, and knows the contents thereof; and that the statements and matters set forth therein i are true and correct to the best of his knowledge, information, and belief.

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Subscribed and sworn to before me this y of Mp96.

%uMwfal Nota Public Notaribeal yttnn p c' hest C May 17, 9

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