ML20247L775
| ML20247L775 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 05/13/1998 |
| From: | Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-96-003, IEB-96-3, NUDOCS 9805260070 | |
| Download: ML20247L775 (2) | |
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Station Support Departmsnt A
NRCB No. 96-03 f
PECO NUCLEAR mco%c-,
9f>5 Chesterteook Boulevard A Unit sf PECO Energy Wyne. PA 19J87-5691 May 13,1998 Docket No. 50-352 License No. NPF-39 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Limerick Generating Station, Unit 1 issuance of License Amendments for Resolution of Unreviewed 5 : c' Safety Question Associated with NRC Bulletin 96-03, " Potential
. ;. f.
Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling Water Reactors"
Dear Sir / Madam:
.,y.
This letter is being submitted as a resuit of discussions with the NRC on May 13,1998, conceming the pending issuance of license amendments for Limerick Generating Station (LGS),
. 1. 0 Unit 1. Thc license amendments pertain to the res:lution of an unreviewed safety question (USQ) supporting the implementation of a plant modification in response to Bulletin 96-03,
.1-
"Pctential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling Water j
Reactors " Specifically, the USQ involves the design assumptions used for determining the amount of debris that would be expected to be generated under LOCA conditions and the amount of material that would be transported to the Suppression Pool.
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The NRC informed PECO Energy of its intentions to issue a new appendix (i.e., Appendix C,
" Additional Conditions") to Facility Operating License (FOL) No. NPF-39 for LGS, Unit 1. This
-'/'
new appendix would include the proposed license conditions for resolution of the USQ and t "'
support closure of Bulletin 93-03. PECO Energy has reviewed the proposed license conditions and finds them acceptable for incorporation into the LGS, Unit 1, FOL. PECO Energy J'?
understands the license conditions to read as follows:
9 This amendment authcrizes the licenses to incorporate in the Updated Final Safety Analysis Report (UFSAR) certain changes to the description of the facility.
Implementation of this amendment is the incorporation of these cioanges as described in the licensee's application dated October 6,1997, as supplemented by letter dated y
February 2,1998, end evaluated in the staff's Safety Evaluation dated [date provided by Q ~l.
NRC).
9805260070 980513 e
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y May 13,1998 '
Page 2 The suppression pool floor and low pressure ECCS (Residual Heat Removal and Core i
Spray) suction strainers shall be visually inspected for sludge accumulation and foreign material. The visualinspection allows use of a remote camera in lieu of divers. The interval of these inspections shall be every otherrefueling outage. The inspection interval.
may be increased based on the finding of two consecutive inspections. Should the licensee choose to increase the inspection interval, data supporting this increase shall be i
~ submitted to the NRC for review.
PECO Energy has collected substantial baseline data regarding Suppression Pool cleanliness conditions (i.e., sludge accumulation rates and foreign material presence) for LGS, Unit 1. This data is based on inspection and cleaning operations performed in the Unit 1 Suppression Pool
.f during the last two (2) refueling outages. We will conduct the required visual inspections every other refueling outage (i.e.,1R09 and 1R11), as stipulated in the proposed license condition above. If the analysis of data collected during the iR09 and 1R11 inspections concludes that an
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increase in inspection interval is justifiable, PECO Energy may decide to change the inspection interval in accordance with the license condition above.
If you have any questions or require additional information, please do not hesitate to contact us.
Very truly yours, S
l/=ug Garrett D. Edwards Director-Licensing Eaclosure cc:
H. J. Miller, Administrator, USNRC, Region I A. L. Burritt, USNRC Senior Resident inspector, LGS I
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