ML20086G977: Difference between revisions

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                                                                                                                        ,M PIL*4.ADELPlil A El.ECTRIC CO)(PANY Pen liot tom Artmic Power St ation Delta, Pennsylvania                                                 _
PIL*4.ADELPlil A El.ECTRIC CO)(PANY
17314                                                 y.-        ; J
,M Pen liot tom Artmic Power St ation Delta, Pennsylvania 17314 Janien P. O'Reilly, Director liarch 3, 1975 y.- ; J r.
: r. Janien P. O'Reilly, Director                                                       liarch 3, 1975                   -
M
M
          ;fice of Intipection And Enforcement                                           /_.E// S E
;fice of Intipection And Enforcement
          'gton 1                                                                                        OEL/VER 7~. M $
/_.E// S E OEL/VER 7~. M$
M R. UML r Bea Wack' 4 ,g ;
'gton 1 1,
1, itted States Nuctrar Regulatory Commtasion 11 Park Avenue l,4 9 ng of Prussin, Pennsylvania                           19406                                                               >
itted States Nuctrar Regulatory Commtasion M R.
                                                                                                                                          . .,4 tbject:                                                                                                                g' jf Abnormal Occurrence 24-liour Notification                                                             4:. > . .
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'[.',
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.%;
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  
Technical Specification  


==Reference:==
==Reference:==
3.1, Table 3.1.1 9,. o,      ;.:.1,
;.:.1, 3.1, Table 3.1.1
: i. 1 -
: i. 1 -
port No.:
port No.:
port Date:
50-270-75-16
50-270-75-16                                                                                     :2 fiarch 2,     1975                                                                         0 .' . -
:2 port Date:
::urrence Date:           March 2, 1975
fiarch 2, 1975 0.'. -
:llity:                                                                                                               (M, Peach Button Atomic Power Station R.D. 1. Delta, Pennuylvania 17314 Q. /
::urrence Date:
s.4 W gg'[ [
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 a@2.-
2ntification of Occurrence:                                                                                            g.          ..
g.
Main Steam Line Radiation !Conitor RIS 3-17-251D failed, downscale.-                     .
6 ((d Main Steam Line Radiation !Conitor RIS 3-17-251D failed, downscale.-
6 ((d iditions Prior to Occurrence:
iditions Prior to Occurrence:
Plant operating at 100% power.
Plant operating at 100% power.
cription of Occurrence:                                                         .
cription of Occurrence:
g Main Steam I.ine Radiation Monitor RIS                                                                                     .%
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
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.
g igantion of Apparent Cause of Occurrence:
Appears to be a probica with che electronics which occurs intermittentl y.
lysis of Occurrence:
lysis of Occurrence:
      = Stonitor       failed dovnscale which cade the particular channel i noperative.
Stonitor failed dovnscale which cade the particular channel i
af the redundant         channels of instrumentation,                                               Because                        .
= af the redundant channels of instrumentation, noperative.
Radiation
Because Radiation Isolation and Scran signals still had the capability of perfthe rc::2aining Main
: heir intended    Isolation   and Scran signals still had the capability of perfthe functions.                                                                orming rc::2aining Main
: heir intended functions.
                                                                                                                                    ~
orming
            >cc u r re n ce .                           Minical safety significance is attached to this 3
~
ective Action.                                                                                                      ..
Minical safety significance is attached to this
      ' 'he     drawerous iscellane        was placed in the tripped condition while repairs were made.                                                        .
>cc u r re n ce.
electronic parts were replaced.
3 ective Action.
orrectly and is being observed                                           The denver is now functioning for indication of further problens.
' '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:
ure Data:
one.
one.
truly yours,                                                                                                 ,
truly yours, n% -> ~,' M,,.<,
n% -> .~<<,' M ,,.<, -o
-o
            . Ullrich, Superintendent                                                                                                         .
. Ullrich, Superintendent h Hotton Atotic Power Station 8401130156 750312 PDR ADOCK 05000278 g
h Hotton Atotic Power Station 8401130156 750312 PDR ADOCK 05000278                                                                                                   :-
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Latest revision as of 02:07, 14 December 2024

Telecopy AO 75-16:on 750302,main Steam Line Radiation Monitor RIS-3-17-251D Failed Downscale.Caused by Problem W/ Electronics.Miscellaneous Electronic Parts Replaced
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)
v • d • e


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

PDR

c..

,.3

.w e.

4, 4};gg,.gsc.g,

,4 l.

g

.,u

. oc............

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