LER 76-026-00 for Hatch, Unit 1 Regarding an Occurrence of Open Links in Panel H11-P601 Defeating the Starting of All RHR Pumps After They Had Been Stopped| ML17252B440 |
| Person / Time |
|---|
| Site: |
Hatch  |
|---|
| Issue date: |
04/15/1976 |
|---|
| From: |
Shannon D
Georgia Power Co |
|---|
| To: |
Mosely N
NRC/RGN-II |
|---|
| References |
|---|
| LER 76-026-00 |
| Download: ML17252B440 (3) |
|
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Text
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GEORGIA POWER COMPANY TEL. (912) 367-6490 EDWIN I. HATCH NUCLEAR PLANT P. 0. BOX 442 (912) 537-8124 B~XLEY. GA. 31513 BAXLEY9 GEORGIA April 15, 1976 Mr. Norman C. Moseley, Director Directorate of Regulatory Operations Nuclear Regulatory Commission Region II, Suite 818 230 Peachtree Street, N.W.
Atlanta, Georgia 30302 Ref: E. I. Hatch Unit No. 1 Docket No. 50-321 Pursuant to Section 6.9.1.2 of Hatch Unit 1 Technical Specifications, please find attached Reportable Occurrence Report No. 50-321/1976-26.
Very ti;uly yours, (iJ~
D. P. Shannon Plant Superintendent DPS/TVG/bev attachs.
cc: G. F. Head W. A. Widner File Control Room 4J27
' \,. .
-- c .. . ".\,,*-
c;, . . ..
. I' L~NSEE EVENT REPORT v
I iw1 I J.
7 ..
CONTROL OLOCK:
,I Jl
- (PLCAO!RINT AU ncau1Rca 1NronMATION]
U:ENSEE .LICENSE EVENT NAME lCENSl' NUMOER TYPE TYPE
. ~ I GI Al El I I HI ll I oI 0 1-1 °1 °1 ° I 0 I 0 1-1 ° I 0 I 14111111111 ., 0 111 7 B 9 14 15 I 25 26 30 31 32 REPORT REPORT
. CATEGORY TYPE SOIJHCE DOCK~ NUMBER EVENT DATE REPORT CATE
@I!] CONI I I I L!J ~ loJ sJ Ol-101312111 IOl410141 7 1 6 1 *IO.i4lll317l61 7 B 57 58 59 60 61 68 69 74 75 BO EVENT DESCRIPTION
[filfil I While in cold shutdown.for LPCI modification, open links in panel Hll-P601 defeated the I 7 8 9 80 (oj3J I starti~g of all RHR pumps after they had been stopped. This condition resulted in I 7 8 9 80
@El I* shutdown cooling being out. of service for a period of 90 minutes. The limits were I 7 B9 BO
@m I closed and the system retui:lned to operation as required by Technical Specifications. I
~~--~~~~~~~--~~~~~~~~~~~~~~~~~~~~~----__JBO 7 El 9
~
FQT61 _
- cso-321/1g16-26) I 7 B 9 -
sYSTEM CAUSE co~JENT COMPONENT Non-Compliance BO
~:mtx .
@El I cl Fl 7 8 9 CODE 10 w
COOE 11 12 . .
COMPONENT COOE I I I NI s I Tl Rf uI 17 SUPPl..ER
~
43 MANUFACTURER 1s13111s1 44 47
~
48 CAUSE DESCRIPTION .
@Ifil I The links had been open to prevent inadvertent starts on the RHR pumps as a result of r 7 B 9 BO lolgl I *the LPCI modification. A lifted wire and jumper tag had been issued and approve<! by I
7 B 9 80 ITJ9] I the Plant Review Board. The link opening did not result in the pumps tripping (cont.)* I,
. 8 9 80 FACILITY METHOD OF "
STATUS 'I& POWER OTHER STATUS OISCDVERY DISCOVERY OESCRIPTION
~
7 8 w
9 IoIoI oJ 10 12 13 N/A.
44 LI.
45 . 46 NA BO FORM OF
/,CTJVJTY CONTENT fiELEASEO OF RELEASE * .,, ,;..-._ AMOUNT OF ACTIVITY LOCATION OF RELEASE lill1 7 B w
9 LE I 10 11 N/A*
44 I 45 N/A
. 80.
PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 7
fillB 9I 0 I 0 I 011I UJ 12 N/A 1';:;3--.~---------------------------------' .80 PERSONNEL INJURIES
.NUMBER . OESCRIPTION
~ I 0 I 0 I 011I N/ A 7 B 9 1~2-------------------------------------B_JO Probable SFSGIJlE CONSEQUENCES 7lillJB9~=...;;------~--------------------------------~--------_J N/A LOSS OR DAMAGE TO FACILITY 00 TYPE DESCRIPTION l!E)o sW 7 N/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _- -_ _ _ _ _ _ _ _ _;___ _ _ _ _ _ _ _ _ _ _ _o_.1o 1~0_..;...
PUBLICITY
[ill] A 7 es 00 ADDITIONAL FACTORS
~ I Cause Description (cont.) but prevented them from being restarted. The drawings correctlyf*
- 7 0 9 00 Ji19! l showed that the links were tied into the start circuit, however, they (cont. p. 2 of 2) uo NAME .._......,_...--...;;.;;.;;.;:;,;:~-~~;;,;;;.;;.;;.;~..;...~...:...--~----
T. V. Greene, Technical Supervisor PHONE:
(912) 367-6490
- p. 2 of 2 Georgia Power Company Plant E. I. Hatch Baxley, Ga. 31513 Reportable Occurrence No. 50-321/1976-26
\
Cause Description (cont.)
did not show clearly that it would defeat the starting circuits for manual control. To prevent a reoccurrence personnel involved with these link openings have been made aware of the need for investigation when more than one wire is connected to each side of the link.