ML20196G718
| ML20196G718 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/25/1998 |
| 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 9812080062 | |
| Download: ML20196G718 (3) | |
Text
_ _._
._._.__..__________.._.._m stenen support :
m NRCB No. 96-03 '
6-PECO NUCLEAR escoce. c -
965 Chestert)took Boulevad j..
A Unit of PECO Energy Wayne, PA 19007 5691 g
November 25,1998 i
Docket No. 50-277 50-278 i
License No. DPR-44 DPR-56 i
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Peach Bottom Atomic Power Station, Units 2 and 3 Supplemental Response to NRC Sulletin 96-03, " Potential l
Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling Water Reactors" j
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Dear Sir / Madam:
)
i On May 6,1996, the NRC issued Bulletin 96-03, Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling Water Reactors," requesting that addressees implement 1
appropriate procedural measures and plant modifications to minimize the potential for clogging of Emergency Core Cooling System (ECCS) suppression pool suction strainers by debris generated during a Loss-of-Coolant-Accident (LOCA).Bulletin 96-03 also required that all addressees submit written reports discussing the specific actions that wf!l be taken, and when the actions have been completed.-
By letter dated November 1,1996, PECO Energy responded to Bulletin 96-03 for Peach Bottom Atomic Power Station (PBAPS), U91ts 2 and 3. In our response, we discussed specific details J
- regarding the plant modifications and associated actions that would be implemented at PBAPS in response to this Bulletin.
Bulletin 96-03 also required that within 30 days of completion of all requested actions, a written report be submitted confirming completion and summarizing the actions taken. Accordingly, this letter serves to notify the NRC that PECO Energy has completed the installation of new large-capacity, passive strainers on the Residual Heat Removal (RHR) and Core Spray (CS) system pump suction lines at PBAPS, Units 2 and 3. The modification work was completed on Unit 3 in i
October 1997 during 3R11, and on Unit 2 in October 1998 during 2R12.
The new strainers have been sized to provide adequate surface area to ensure operability of the ECCS pumps, and therefore, will assure that the ECCS can perform its intended safety function and minimize the need for operator action to mitigate the consequences of a LOCA. The size and shape of the new strainers will preclude a loss of net positive suction head (NPSH) for the ECCS pumps due to debris accumulation on the strainers following a LOCA.
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November 25,1998 Page 2 j
Ag previously discussed in o~ r letter dated November 1,1996, and reiterated in supplemental u
correspondence concoming Bulletin 96-03, new strainers were not installed on High Pressure Coolant injection (HPCI) system pump suction lines, since the HPCI system does not function to 4
1 provide lon0-term cooling capability following a LOCA. In addition, the primary source for suction supply for HPCI is the Condensate Storage Tank (CST) and not the suppression pool (torus).
I PECO Energy has completed the requested actions associated with Bulletin 96-03 for PBAPS,
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Units 2 and 3.
This letter is being submitted under affirmation, and the required affidavit is enclosed.
if you have any questions or require additional information, please do not hesitate to contact us.
Very truly yours, l
I
_0 -
Garrett D. Edwards
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Director-Licensing i
t Enclosure I
cc:
H. J. Miller, Administrator, USNRC, Region i A. C. McMartray, USNRC Senior Resident inspector, PBAPS j
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COMMONWEALTH OF PENNSYLVANIA ss.
COUNTY OF CHESTER J. J. Hagan, being first duty swom, deposes and says:
That he is Vice President of PECO Energy Company; that he has read the foregoing supplemental response to NRC Bulletin 96-03,
- Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling Water Reactors," for Peach Bottom Atomic Power Station, Units 2 and 3, 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.
ic Presi dent 1
Subscribed and swom to I
before me this day A
1998.
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.d/&
( Notary Publib/
NOTARIAL SEAL CAROL A WA(. TON.NowyPubse Cny of Ph..adelph.a Pda. County W commission Expves May 2il 2001 l
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