ML20084K068
| ML20084K068 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 09/13/1974 |
| From: | Kalivianakis N COMMONWEALTH EDISON CO. |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20084K071 | List: |
| References | |
| AO-50-265-74-23, NJK-74-278, NUDOCS 8305190136 | |
| Download: ML20084K068 (3) | |
Text
-
1 Comnh.as Generat;ng Station
(')
- p%"**,f 2alth Edissn t
\\ 'p t 1 ihff, Guad-Ci ff-N..
/
'.'. l i ;, ', - "
Post Office Box 216 c( h k
Cordova, t!!inois 61242 Q/
. k ['/
9 Telephone 309/654-2241 bLdu, h N
.d g,
SEPlGi3M Z
~
t.t. g. g
['[l/
'G.Os f.
e a s.:a.: A
, ( \\ 'y
.u e
September 13, 1974 "LV Mr. John F. 0 ' Leary, Director
. Directorate of Licensing Regulat' ion U. S. Atomic Energy Comiission Washington, D. C.
20545
Reference:
Quad-Citics Nuclear Power Station, Unit 2 Docket No. 50-265, DPR-30, Appendix A Sect ions 1.0.A.4, 4.1.A, Tab le 4.1.1, and 6.6.B. I.o
Dear fir. O ' Leary:
Enclosed please find Abnormal Occurrence Report No. A0-50-265/74-23 for Quod-Cities Nuclear Power Station. This occurrence was previously reported to Region i
lit, Directorate of Regulatory Operations by telephone on Septernber 3,1974, and to you and Region Ill, Directorate of Regulatory Operations by telecopy on Sep-i tember 3, 1974.
This report is submitted to you in accordance with the requirements of Tech-nical Speci fication 6.6.B. I.a.
Very truly yours, C0iE0 WEALTH EDISON C0!!PANY quad-CITIES NUCLEAR POWER STATION l/9 j
- /
y
,8',,: 0'?.'{R?lll H. J. Kallvianakis
/
Station Superintendent HJK/CWS/jeh j
cc: P.egion lit, Directorate of Regulatory Operations J. S. Abel
Enclosure:
Abnormal Occurrence Report 50-265/74-23
/
[d ' Q Yi OY lt ) ga
- , f i
J h0$OCK05000265 013b 740913 l
S PDR
~ 9 ',9 9 i
COPY SENT REGION/- -,
G Qj
~
REPORT NUMBER:
AO-50-265/74-23 REPORT DATE:
September 13, 1974 OCCURRENCE DATE:
September 3, 1974 FACILTTY:
Quad-Cities Nuclear Power Station Cordova, Illinois 61242 IDENTIFICATION OF OCCURRENCE:
Failure of MSIV Closure Test to initiate half scram and annunciator alarm CONDITIONS PRIOR TO OCCURRENCE:
Unit 2 in cold shutdown N s s DESCRIPTION OF OCCURRENCE:
At 4:30 a.m.
on September 3, 1974, during routine monthly surveillance testing on MSIV closure, fuse 590-702F (panel 902-17 "TBE" F-3) was pulled to simulate a closed MSIV on "B"
steam line.
The MSIV test closure switch was used to operate the MSIV 2-203-lD solenoid.
The valve closed'to the 10% closed position and reversed to the full open position as expected.
However, a half scram and annunciator alarm were not received at the 10% closed position.
DES'IGNATION OF APPARENT CAUSE OF OCCURRENCE :
The exact cause of this occurrence cannot be determined.
It is possible that the operators did not properly execute the steps of the test procedure.
Or it is possible that the valve travel during the test did not fully actuate the alarm and scram microswitch.
Since the investigations by the electrical maintenance personnel showed there were no malfunctions, and since the test was performed successfully three times later in the day, no cause for the reported occurrence can be determined.
ANAINSIS OF OCCURRENCE:
The sa fety implications of this occurrence are cons ide red minimal based on the fact that the valve did operate to the 10%
closed position as evidenced by the test circuit functioning pro-perly.
If an actual isolation signa 1 had b+en present, the proper l
l l
I
+ * * *
._y_
alarm and scram signals would have;been received either by cc's-plete closure of this MSIV or by closure of the remaining MSIV's.
The tests performed later showed that the test circuit and the scram and alarm circuits 'did function properly.
CORRECTIVE ACTION:
The corrective action taken to correct this occurrence was to repeat the surveillance test at 10:00 a.m. on Septeinber 3, 1974.
The test was performed successfully three times.
La ter
, during the day investigati'ons were made by electrical maintenance personnel and no abnormalities were found.
If any similar failures are reported in the future, they will be investigated and resolved.
PAILURE DATA:
No failure data is reported since there is no known cause for this failure.
l l
4 6