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
.
PIL*4.ADELPlil A El.ECTRIC CO)(PANY
,M Pen liot tom Artmic Power St ation Delta, Pennsylvania 17314 Janien P. O'Reilly, Director liarch 3, 1975 y.- ; J r.
M
- fice of Intipection And Enforcement
/_.E// S E OEL/VER 7~. M$
'gton 1 1,
itted States Nuctrar Regulatory Commtasion M R.
UML r Bea Wack' 4
,g ;
11 Park Avenue l,4 9
ng of Prussin, Pennsylvania 19406
..,4 g' jf tbject:
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 j,s,/ :. i ference:
License Number DPR-56 9,. o, R.%;
~
Technical Specification
Reference:
- .
- .1, 3.1, Table 3.1.1
- i. 1 -
port No.:
50-270-75-16
- 2 port Date:
fiarch 2, 1975 0.'. -
- urrence Date:
March 2, 1975 (M,
- llity:
Peach Button Atomic Power Station Q. /
R.D. 1. Delta, Pennuylvania 17314 s.4 W gg'[ [
2ntification of Occurrence:
g a@2.-
g.
6 ((d Main Steam Line Radiation !Conitor RIS 3-17-251D failed, downscale.-
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
g igantion of Apparent Cause of Occurrence:
Appears to be a probica with che electronics which occurs intermittentl y.
lysis of Occurrence:
Stonitor failed dovnscale which cade the particular channel i
= af the redundant channels of instrumentation, noperative.
Because Radiation Isolation and Scran signals still had the capability of perfthe rc::2aining Main
- heir intended functions.
orming
~
Minical safety significance is attached to this
>cc u r re n ce.
3 ective Action.
' 'he drawer was placed in the tripped condition while iscellane ous electronic parts were replaced.
repairs were made.
The denver is now functioning orrectly and is being observed 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 g
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