ML20086G977
| ML20086G977 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/03/1975 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086G975 | List: |
| References | |
| AO-75-16, NUDOCS 8401130156 | |
| Download: ML20086G977 (1) | |
Text
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,M PIL*4.ADELPlil A El.ECTRIC CO)(PANY Pen liot tom Artmic Power St ation Delta, Pennsylvania _
17314 y.- ; J
- r. Janien P. O'Reilly, Director liarch 3, 1975 -
M
- fice of Intipection And Enforcement /_.E// S E
'gton 1 OEL/VER 7~. M $
M R. UML r Bea Wack' 4 ,g ;
1, itted States Nuctrar Regulatory Commtasion 11 Park Avenue l,4 9 ng of Prussin, Pennsylvania 19406 >
. .,4 tbject: g' jf Abnormal Occurrence 24-liour Notification 4:. > . .
6'[.',
nfirming W. T. U11 rich's phone conver ;ation ulth Mr. .q . r ited States Suclear Regulatory Coc: mission on f arch 2,1975.H. W. Crocke.r, Region 1 3. i l ference: j,s,/ :. i License Number DPR-56 R.%;
~
Technical Specification
Reference:
3.1, Table 3.1.1 9,. o, ;.:.1,
- i. 1 -
port No.:
port Date:
50-270-75-16 :2 fiarch 2, 1975 0 .' . -
- urrence Date: March 2, 1975
- llity: (M, Peach Button Atomic Power Station R.D. 1. Delta, Pennuylvania 17314 Q. /
s.4 W gg'[ [
g a@2.-
2ntification of Occurrence: g. ..
Main Steam Line Radiation !Conitor RIS 3-17-251D failed, downscale.- .
6 ((d iditions Prior to Occurrence:
Plant operating at 100% power.
cription of Occurrence: .
g Main Steam I.ine Radiation Monitor RIS .%
operating at approximately 100% power. 3-17-251D failed downscale while pl ant was 3 ?.? ti M igantion of Apparent Cause of Occurrence: g Appears to be a probica with che electronics which occurs intermittentl y.
lysis of Occurrence:
= Stonitor failed dovnscale which cade the particular channel i noperative.
af the redundant channels of instrumentation, Because .
Radiation
- heir intended Isolation and Scran signals still had the capability of perfthe functions. orming rc::2aining Main
~
>cc u r re n ce . Minical safety significance is attached to this 3
ective Action. ..
' 'he drawerous iscellane was placed in the tripped condition while repairs were made. .
electronic parts were replaced.
orrectly and is being observed The denver is now functioning for indication of further problens.
ure Data:
one.
truly yours, ,
n% -> .~<<,' M ,,.<, -o
. Ullrich, Superintendent .
h Hotton Atotic Power Station 8401130156 750312 PDR ADOCK 05000278 :-
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