ML20069G455
| ML20069G455 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/22/1983 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-SSINS-6820 5211-83-091, 5211-83-91, IEB-83-04, IEB-83-4, NUDOCS 8303250155 | |
| Download: ML20069G455 (2) | |
Text
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GPU Nuclear Corporation U Nuclear minge8s48o s
Middletown. Pennsylvania 17057 717 944-7621 TELEX 84 2386 Writer"s Direct Dial Number:
March 22, 1983 5211-83-091 Mr. R. C. Haynes Region I, Regional Administrator U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406
Dear Sir:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 IE Bulletin 83-04 This letter is in response to your letter of March 11, 1983 forwarding IE Bulletin 83-04 concerning failure of reactor trip breakers to open during testing of UV trip function.
Sincerely, l
H. D. Hukill Director, TMI-l HDll: RAS:vj f Enclosure cc:
R. J. Conte l
Sworn and Subscribed to Before me this 22nd day of March
, 1983.
_ h.
h-Not a y Public 0 3MLA Jt AN bloolf NJI4Wf rW3[1 M6DDifiOWN 30it0 DAUPHIN COUNTY MY COMMIS$10N EXPIRES JUNE 17.1985 lienbet, Pennsylvania Assocntion of Notanas GPt1 Nuclear Cornoration is a subsidiary of the General Public Utilities Corporation 8303250155 830322 PDR ADOCK 05000289 (i)
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DRATT FISPOSSE TO SRC 5;LLE!!S E2-04 TAILURE OF TdE C:::ERVOLTAGE TRIP FC:C CS C7 FIAC OR !?l? EFIAT.EFS 1:e a.
Identify results of testing performed in response to item 1.
Plants without on-line testability should reper: the date and results of the most recent test.
Response: Tests of the undervoltage trip feature were performed on 3/17/83.
All six breakers tripped correctly and tripped within the allowable time.
".Ite: b.
Identify confor:ance of the =aintenance ;regra= te manuf acturer's reco:sendation and describe results of maintenance performed directly as a result of this Bulletin in respense to ite: 2.
Response: The preventive maintenance prograc is in accordance with the manufacturers tas: rue:icns included in Bulletin 79-09.
The =aintenance was perf orned during February 1983 and results were satisf actory.
Ite c.
Provide a statement that provisions are in place to notify licensed operators of the Sale = and San Onofre events and bring to their attention appropriate f ailure-to-trip emergency procedures upon : heir t arrival on-shift.
~
Respons e: Provisions are inplace to notify operators of the Salem and San Onofre events and to instruct them on the procedure to be followed in the"*
event the reactor fails to trip.
Itet d.
Provide a description of all RPS breaker ralfunctions not previously reported to the NRC.
Response: On November 19,1976 at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, one of the AC trip breakers failed to trip during Post Maintenance Testing.
The reac:or was in a shutdown condition when the event occurred and :he oth:r CRD breakers were racked The cause for the malfunction was binding of the undervoltage out.
k device.
The problem was corrected and the breaker was retested.
The event was evaluated by :he Plan: Opera:1cn Re.iew C:::ittea and deter =ined to be not reportable.
The even: was nc: reported because the binding was caused by transpor:ing and installing the breaker and the =alfuncticn was detected before re:urning the syster to service.
Iten e.
Verify that procurement, testing and maintenance activities treat the RPS breaker rnd TV devices as safety related.
Reper the results of this verification to the NRC.
Respense : The CRD Trip portion (AC and DC Trip Breakers, Undervoltage Device and Electronic Trips) is classified as Nuclear Safety Related.
This class-ification requires that procurement, testing and maintenance be identified as safety related and is accomplished under the Operational QA plan.
Procurement is identified as safety related commerical grade, and QA requirements specify receipt inspection and functional testinc according to approved site procedures.