ML20086H600
| ML20086H600 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/20/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086H598 | List: |
| References | |
| A-75-52, A0-75-52, NUDOCS 8401180148 | |
| Download: ML20086H600 (1) | |
Text
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PHILA~ELTRA E*,ECTRIO CC"PANY /
Peach s o *. t c = Atenie Power Station I
Oedta, Fe.asylvants e
17330
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Unitei E rte: A enic E ercy Cennic-ion
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Directorate of Regulat ery Operttions
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j 631 Pa ri Ayer:ue e,
h King of Prussia, Pesnsylvania 19kO6 Sutfect:
Abnerrsi Seeurtence ?L-Ecur Notificat'en
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- Co= fir =ing W.
T. Ullrich's phone eenversation with Mr. Walt launack, Region 1, 'Jnited St stes Nucicar Regulatory Oc==is.sica on August 20 1975.
Reference:
- icense Nu=ter OPR-56 Technical Specification
Reference:
3.2.D Report Eo.:
50-278-75-52 Report Date:
August 20 1975 Occurrence Date:.
August 19, 1975 Facility:
Peach 3ctten Ate =ie Power Station R.D.
1, Delta, Pennsylvania 1731h Identification of Occurrence:
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3A Reactor Building Exhaus.t Rad monitor.(RIS-3-1T h52A) High Badiation trip set point exceeded Technical Specification limits.
" CoEditions Prior to Occurrence:
Unit 3 was operating at 555 power.
Description of Occurrence.
While performing ST k.2 - Reactor Building Exhaust Radiation =onitor functional test, it was discovered that the 3A Radiation nonitor as found High Radiation trip setpoint was 2h cr/hr.
The Technical Specification limit is ( 16 nr/hr.
Designation of Apparent Cause of Occurrence:
Instrument s etpoint -dF;l ft.
Analysis of Occurrence:
The device is one of four arranged in a one-out-of-two twice logic (which initiates a Group III isolation on reactor zone ventilation exhaust high radiation) such that the high trip setpoint would not have prevented the isolation fro = actuating at the correct.pcint.
For this reason, and.the fact that the device was still functional, the ssfety implication of this cecurrence is nininal.
Corrective Action:
The setpoint was adj ust ed. the calibration checked, a=d the surveillance test was successfully rerun on the 3A nonitor.
Failure Data:
No previcus failures of this type.
Very truly yours,
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T. Ullrich. S ur. o r i st e n te:-
Peach 2cttd Ato=tc
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