05000316/LER-2075-074, Re Failure of Loop 2 Steam Generator Stop Valve
| ML18219C379 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 12/10/1975 |
| From: | Jurgensen R Indiana Michigan Power Co |
| To: | James Keppler NRC/RGN-III |
| References | |
| LER 1975-074-00 | |
| Download: ML18219C379 (8) | |
| Event date: | |
|---|---|
| Report date: | |
| 3162075074R00 - NRC Website | |
text
NRC RIBUTION FOR PART 50 DOCKE~rVIATERIAL (TEMPO RARY FO RM)
CONTROL NO-.
14011 FILE INCIDENZ REPORT FT]
FROM. Indiana 8 Michigan Power.
Bridgman, Michi'gan W. Jur ensen TO:
J.G.
Keppler
'GAVE OF DOC 12-19-75 ORIG 0
DATE Pii-t 'Cr".
12-17-75 CC OTHER "t TR TWX XXX RPT OTHER SENT AEC PDR SENT LOCAL PDR GLASS UNCLASS XXX PROP INFO INPUT NO CYS REC'D 304
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's DOCKET NO:
50-315 DESCR IPTION:
Letter trans the following.......
Abno
.the (30 mal Occurrence 8 75-74; on 11-'14-75,. Concerning,
ENCLOSURES:
oop 4'
'Steam generator stop valve 'failing to close
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PLANT NAME:
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IIVDIAIVAEc NICHIGAIVPDNER CDMPAIVY DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 December 10, 1975 Mr. J.G.
Keppler, Regional Director Office of Inspection and Enforcement United States Nuclear Regulatory, Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License NoP..-DPR-58 Docket No. 50-315
Dear Mr. Keppler:
Pursuant to the requirements of Appendix A Technical Specifications and the United States Nuclear Regulatory Commission Regulatory Guide 1.16, Revision 3, Section 2.b, the following Abnormal Occurrence Report is submitted:
AO 50-315/75-74 Sincerely, r
C R.W. Ju ens n
Plant Manager
/bab cc:
R.S.
Hunter J.E.
Dolan G.E. Lien R. Kilburn R.J. Vollen BPI R.C. Callen MPSC K.R. Baker RO: III P.W. Steketee, Esq.
R. Walsh, Esq.
G. Charnoff, Esq.
G. Olson PNSRC R.S.
Keith Dir., IEi:(30 copies)
Dir., MIPC (3 copies)
J.M.
Henni gan
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LICENSEE EVENT REPORT Form No. 4494
~ [P CONTROL BLOCK:
(PLEASE PAINT ALLREQUIRED INFORMATION) 6 LICENSE EVENT LICENSE NUMBER TYPE r YPF.
0 0 0
0 0
0 0 0
4 1
1 1
1
~0011 25 28 30 31 32 LICENSEE NAME Qog M
I 0
0 C
I 0
7 89 14 15 REPORT SOURCE REPORT CATEGORY TYPE [OO1I ooN'T ~po L
7 8
57 58 59 OOCKET NUMBER EVENI OATF RI PORT OATF:
50 0 3
'1 5
1 1
1 4
7 5
1 2
03 7
5 68 89 74 75 00 L
0 60 61
EVENT DESCRIPTION
Qo~]
While erformin routin surveillance test STP.018 to corn ly with Technical Specifica-So
.1.
B the L 0 2 steam enerator sto valve failed to close 7
8 9I t'
'rm 7
89 80 g4] ~w't~
e u'r d 5
onds.
Actual closure times were 9.8 and 9.2 seconds in two 7
8 9 80 toad tests.
The h draulic s stem throttlin b
ass valve was adjusted to reduce closing 7
8 9
@os time to 2.0 seconds.
Valve Data - 28" Hopkinson valve, 1100 PSIG, hydraulic and 80 7
8 9 SYSTEM
CAUSE
COBE CODE [onri ~CO F
V 7
8 9 10 11 12 CAUSE DESCRIPTION gg The h draulic s
(AO-050-315/75-74)
VIOIATION
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Y 48 PRME COMPONENT SUPPUER COMPONENT MANUFACTURER A
5 8
5 44 47 COMPONENT CODE A
L V
E X
L 17 43 m
es on rin
- -t rision settin whic is controlled.b ad-7 89 80 I'u ti the throttlin b
ass valve
.vias sli htly out of adjustment causing an in-g Q 7
89 FACILIfY STATUS POWER OTHER, STATUS c
~00 0
7 8
9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY [gg
~z z
NA 7
8 9
10 11 PERSONNEL EXPOSURES NUMBER TYPE OESCRIPTION Pg ~oi~
Z NA 7
89 11
.12 13 PERSONNEL INJURIES NUMBER OESCRIPTION Q4] ~0~
NA 7
69 11 12 80 METHOO OF OISCOVERY DISCOVERY OESCRIPTION B
NA 44 45 46 80 LOCATION OF RELEASE NA 44 45
'80 80 80 OFFSITE CONSEQUENCES No offsite conse uences 80 7
8 9 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION Qs] ~
7 89 10 PU8LICITY 7
89 80 r
80 1
ADDITIONAL FACTORS CD 8
II II 7
89.
am actuated.
80 80 7
89 PHONE.
616-465-5901 EXt; 352 J.
G. Bencivenga GPO SIIT eeT 7
8 9 80 crease in the valve closinq time Plans have been Imade to check the closin time on
y
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SUBJECT:<
Licensee Event Report covering Abnormal Occurrence Number AO-050-315/75-74 Cause Description continued - the 82 steam generator stop valve at our next outage (presently scheduled for December 26, 1975).
If required at this time, further measures will be taken to assure that the spring tension setting will remain fixed.
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