ML20155B949
| ML20155B949 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/30/1988 |
| From: | Gallagher J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-003, IEB-88-3, NUDOCS 8810070166 | |
| Download: ML20155B949 (5) | |
Text
NRC Bulletin No. 88-03 PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHIL ADELPHI A, PA 19101 (zisisai soot JOSEPH W. G ALLAGHER
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September 30, 1988 Docket Nos. 50-277 50-278 License Nos.
DPR-44 DPR-46 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Peach Bottom Atomic Power Station Response tu NRC Bulletin No. 88-03: Inadequate Latch Engagement in HPA Type Latching Relays i
Manufactured by General Electric (GE) Company
)
Dear Sirs:
The subject Hulletin identified certain latching-type relays supplied by GE with Certificates of Conformance, (qualifying them to the requirements of IEEE-323, "IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations," which includes IEEE-344, "IEEE Recommended Practices for Seismic Qualification of Class lE Equipment for Nuclear Power Generating Stations") which were malfunctioning.
The NRC specifically identified model IIPA 151B, HPA 154B and IIPA 154E relays with a manufacturing date code prior to November, 1987 as those of which the operability has been brought into question.
Additionally, the following latching-type llPA relays which were not qualified to IEEE-323 by GE, but which may have been qualified and used by "Other Equipment Manufacturers" in Class 1E (safety-related) applications were identified as suspect:
Non-Century Series Century Series llPA 54 IIPA 154 Ill'A 7 4 IIPA 174 IIPA 5111 llPA 151B llPA 711s IIPA 1710
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U.S.
Nuclear Regulatory Commission Septenber 30, 1988 Page 2 In accordance with the Bulletin, Philadelphia Electric Company has reviewed HPA Relay applications at the Peach Bottom Atomic Pcus Station and, based upon the results of this review, it has been determined that there are 4 (four) General Electric HPA latching-type relays installed in Class IE applications at Peach Hottom Atomic Power Station Unit 2 and Unit 3.
These relays are designated as tne MCA relays associated with the Emergency Diesel Generators El, E2, E3 and E4.
The relays were inspected in accordance with the "Actions Requested" delineated in Bulletin 88-03.
These actions are reiterated below along with the results of the required inspections (Pass or Pail).
Action Requested 1.
"In accordance with the GE recommendation contained in, measure the distance between the top of the molded contact carrier and the top of the relay armature.
This distance should be a minimum of 1/32 inch."
Heuponse The following relays, installed in Class lE Applications, were identified as suspect and inspected in accordance with the above Action Requested.
The results are as follows:
Ielay Result j
El Diesel MCA Pass E2 Diesel MCA Paco E3 Diesel MCA Pass E4 Diesel MCA Pass Accordingly, none of the four suspect. relays required corrective actions as a result of this inupection.
Action Hequeated 2.
"In accordance with the GE recommendation contained in Attachment 1,
with the armature fully depressed against the pole piece, check to see if the latch is tully rotated by pulling up on the latch assembly.
If the latch is fully rotated, there should be no motion of the latch, since the latch should be held against the armature by spring tension."
U.S.
Nuclear Hegulatory Commission Septenbar 30, 1988 Page 3
Response
The following relays, installed in Class 1S Applications, were identified as suspect and inspected in accordance with the above Action Requested.
The results are as follows:
Helay Result El Diesel MCA Pass E2 Diesel MCA Pass E3 Diesel MCA Pass E4 Diesel MCA Pass Accordingly, none of the four suspect relays required corrective actions as a result of this inspection.
Action Requested 3.
"Repair or replace any relay which falls the above inspections, such that the relay satisfies the GE criteria."
Response
This Action was not applicable to the identified relays since there were no inspection failures.
Action Hequested 4.
"Inspect all existing spare IIPA relays as above.
Future aparea received should be inspected prior to their installation if manufactured prior to November 1, 1987."
l 1
Rcaponse There are no spare llPA relaya at Peach Bottom Atomic Power Station.
All llPA latching-type relaya received in the future will be screened during receipt inspection to determine I
the date of manufacture.
This screening will be accomplished using plant administrative methoda.
If the manufacture date in prior to November 1, 1987 the relay shall be inspected as delineated in the Bulletin.
In accordance with the Bu)letin, Philadelphia Electric Company has inapected the llPA relays installed in Class 1E applications at Peach Bottom Atomic Power Station and, based upon the results of these inspections, these General Electric IIPA latching-type relays have been found acceptable and no further corrective actions are necessary.
U.S.
Nuclear Regulatory Commission Septembnr 30, 1988 Page 4 If you have any questions or require additional information, please do not hesitate to contact us.
Very truly yours, b8:_
cc:
W.
T.
Hussell, Regional Administrator, Region I, USNRC T.
P. Johnson, USNRC Senior Resident Inspector, PBAPS T.
H. Magette, State of Maryland J.
Urban, Delmarva Power J.
T.
Boettger, Public Service Electric & Gas II.
C.
Schwemm, Atlantic Electric k
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COMMONWEALTli OF PENNSYLVANIA ss.
COUNTY OF PIIILADELPlilA J.
W. Gallagher, being first duly sworn, deposes and says:
That he is Vice President of Philadelphia Electric Company, the Licensee herein; that he has read the foregoing response to NRC Bulletin 88-03, "Inadequate Engagement in HFA Type Latching Relays Manufactured by General Electric (GE) Company" 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, b
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o Vice President Subscribed and sworn to before me this34' day ot September, 1988.
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