ML20132B359
| 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) | |
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Sixtion Support Deprrtment A
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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
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NPF-85 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:
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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.
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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:
i
+.
Unit 1 - February 1994*
Total area = 0.4% of specified limit 1
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 i
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.
If you have any questions, please do not hesitate to contact us.
i i
Very truly yours, G. A. Hunger, Jr.
Director - Licensing Enclosure l
cc:
H. J. Miller, Administrator, Region I, USNRC (w/ enclosure) l N. S. Perry, USNRC Senior Resident inspector, LGS (w/ enclosure) i R. R. Janati, PA Bureau of Radiation Protection (w/ enclosure) 4
COMMONWEALTH OF PENNSYLVANIA SS COUNTY OF CHESTER 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 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-85, and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information, and belief.
s Subscribed and sworn to before me this y
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