ML20062J852
| ML20062J852 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/06/1980 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-17, NUDOCS 8011120510 | |
| Download: ML20062J852 (2) | |
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- 4 j.3sA H M-U PHILADELPHIA ELECTRIC COMPANY na Peach Bottom Atomic Power Station Delta, Pennsylvania 17314 C0 XU! 10 E'i 5 01 Nevenber 6, 1980 i
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i Mr. Boyce H.
Grier Cffice of Inspection and Enforcement Rogion 1 United States Nuclear Regulatory Commission 631 Park. Avenue-i; King of Prussim, PA 19406 SUaJECT:
REPORTABLE OCCURRENCE - PROMPT NOTIFICATION Ceafirming, News _rd Metz'- conversation with Mr. Cougill on Nbyesbir 5,.
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1980.
Goference:
Decket No. 50-277 Peach Botton Unit 2 Technical Specification
Reference:
3.5.C.1 and NRC Bulletia 80-17 (July 3, 1980)
Report No. 2-80-26/IP Occurrence Date:
November 5, 1980 l
Identification of Occurrence:
l on the HFCI system, l
While performing a routine surveillance test the control room operator observed NFCI to start, trip and restart in succession seversi times.
Additionally, no speed indication was cheerved on the control room indicatioR while the turbine was starting.
The speed signal to the indicator is the same as that to,the RFC1 controls which is set to open the control valve to the failure.
This caused the turbine full open position om speed signal to. increase speed up to the mechanical overspeed trip sad trip off.
feature allowing the The MPCI system is supplied with an auto-reset
.S.. tarbrine to restart and repeat the process.
Local observation eenfirmed this conditi.on.
-hMConditiene Prior to Oecurrence:
..wn.
THIS DOCUMENT CONTAINS S ymit 2 operating at essentially full power.
POOR QUAUTY PAGES ge-I est Cause of Occurrence:
i 4:resister which provides input power to thelEGMiwas found to be opea, L "._1;.eeting.the speed controller from fuastioning properly.
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Analysis of Occurrence:
In the case where HPCI would have been required to start,the conditions explaimed above would have prevented HPCI from performing its required function.
Testing of backup systems was initiated as required by Tech Spec 3.5.C.2.
The HFCI w
turbine was returned to service in about 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br />.
4 &...--Corrective Action:
i-An in-kind replacement of the failed component was installed and I
the NPCI turbine tested to verify satisfactory operation of the control system.
The RPCI was declared operable by 8:00 AM on
' 2.
11/6/50.
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Previous Peilures:
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Very truly yours, m
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Ullrich g.
Station Superintendent
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