ML19261F190
| ML19261F190 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/21/1974 |
| From: | Arnold R METROPOLITAN EDISON CO. |
| To: | |
| References | |
| GQL-0103, GQL-103, NUDOCS 7910250610 | |
| Download: ML19261F190 (5) | |
Text
AEC DT"IEUTIC'! FOR PA?? 50 DCCKET ur-IAL~
(TD!PORARY FORM)
CONTROL NO:
5697 FILE:
DATE OF DOC DATZ REC'D LTR TWX RPT CTEER FRCM:
"etropolitan Edison Comnany Reading, Penn. 19603 Mr. R.C. Arnold 6-21-74 6-24-74 X
TO:
ORIG CC OTHER SENT AEC PDR XXX SENT LOCAL PLR
.CC<
AEC 1 signed CLASS UNCLASS PROP INFO INPUT NO CYS REC'D DOCKET NO:
XXX 1
50-289 DESCRIPTION:
ENCLCSURES:
Ltr reporting abnornal occurrence No. A0 50-289/
74-10....concerning Failure of Makeup and Purification Pump 1C.....
PLANT NAME:
Three Mile Island FOR ACT C: /IN70'Lv).TICN UNO-N BUTLER (L)
/ SCHWENCER (L)
ZIEMANN (L)
REGAN (E)
W/ CYS W/ 7 CYS W/ CYS W/ CYS CLARK (L)
STOLZ (L)
DICKER (E)
W/ CYS W/ CYS W/ CYS W/ CYS D400 /t 4 traec4if A /f \\
inim uermt /es W/ CYS W/ CYS W/ CYS W/ CYS KNIEL (L)
PURPLE (L)
YOUNGBLOOD (E)
W/ CYs W/ CYS W/ CYS W/ CYS INTERNAL DISTRIBUTION g@ G FILg TECH REVIEW DENTON LIC ASST A/T IND
% rud w41ENDRIE GRDIES DIGGS (L)
BRAITMAN
/0GC SCHROEDER GAMMILL GEARIN (L) 5ALTZMAN A!UNTZING/ STAFF
/MACCARY KASTNER
/ GOULBOURNE (L)
B. HURT
/ CASE
.# KNIGHT BALLARD KREUTZEB GIAMBUSSO
/PAWLICKI SPANGLER LEE (L)
PLANS BOYD A HA0 MAIGRET (L)
MCDONALD
/ MOORE (L)(LWR-2) 4 TELLO ENVIRO REED (E)
CHAPMAN DEYOUNG (L)(LWR-1) / HOUSTON MULLER SERVICE (L)
DUBE w/ input SKOVHOLT (L) o#$l0 VAR DICKER SHEPPARD (L)
E. COUPE COLLER (L) evtOSS KNIGHTON SLATER (E)
P. COLLINS
- IPPOLITO YOUNGBLOOD SMITH (L)
/D. THOMPSON (2)
DENISE VIE:'r.SCO REGAN TEETS (L)
- dLECKER W G OPR p/LONG PROJECT MGR WILLIAMS (E)
/EISENEUT FILE & REGION (3) VLAINAS WILSON (L)
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METROPOLITAN EDISON COMPANY DOCT CF*lCE BOX 542 AEAOING, PE"wNSYL'/ANI A 196C3 TELEPwCNE 215 - 929 2601 June 21, 197h GQL 0103
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Directorate of Licensing
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Dear Sir:
N-%/
Operating Licenie DPR-50 Dceket No.
'0-239 In accordance with the Technical Specifications for Three Mile Island Nuclear Station, Unit 1, we are reporting the follcwing abnormal occurrence:
(1)
Eeport Number: A0 50-289/Th-10 (2a) Report Date: June 21, 197L (2b) Cccurrence Date: June 13, 197L (3)
Facility: Three Mile Island Nuclear Generating Staticn, Unit 1 (h)
Identificatien of Cccurrence:
Title:
Failure of Makeup and Purification Pump 10.
Type:
An abnormal occurrence as defined by the Technical Speci-fications, paracraph 1.8d, in that the failure cf Makeup and Purification Pump 1C threatened to cause an Engineered Safeguard feature or system tc be incapable of performing its intended function.
(5)
Conditions Prior to Occurrence: The Reactor Coolant System was in a hot shutdown ceniition, with major plant paraceters as follevs :
P:ver:
Core: 0 Elec:
0 kh\\
FC Flow:
lhi X 10 lbs/hr 3a s
L ' &, 's.J
Directorate of Licensing June 21, 19?h RC Pressure: 2155 psig RC Temp.-
532 F PRZR Level:
125 in.
PRZR Temp.-
650 F (6)
Eescription of Cccurrence: At 1h30 hours en June 13, 1975, Makeup and Purification Pump 1C was run for approximately 26 seconds with its Suction Isolation Valve (MU-V72C) closed. Makeup and Purifi-cation Pump 10 was being placed back into service from maintenance so that Makeup and Purification Pump 13 could be taken cut of service.
Upon starting the 1C Pump from the centrol rocm console, the control room cperator noticed an abnormally lov starting current and secured the pump.
An investigation was initiated to determine if any damage had been dcne to the pump. It was found that the pump shaft could not be turned by hand, indicating that the pump had suffered some internal damage.
(7)
Designation of Apparent Cause of Occurrence: The failure of Makeup and Purification Pump 1C was caused by excessive heat buildup.
This heat buildup, in turn, resulted frca running the pump with its suction line cloced.
A personnel error is also partly responsible for the incident's having occurred.
In two independent valve lineup checks conducted prior to starting the pump, Suction Valve MU-V72C was noted as being open, when in fact it was closed. This personnel error was at least in part the consequence of an equipment deficiency in that the valve was difficult to move and the mechanical pcsition indicator was not operating.
(8)
Analysis of Occurrence:
It is believed that the failure of Makeup and Purification Pump 1C did not represent a threat to public safety or health in that the plant's safeguards system was not adversely affected. During an LOCA only one of the three injection lines is required to provide core protection.
(9)
Corrective Action: The only i= mediate corrective actica taken was to secure the pump from further operation.
The Plant Operations Review Cemeittee (PORC) met prcmptly after the incident and the Station Superintendent appointed a special PORC subecnmittee to investigate tre punp failure. The following recenmendations were generated frcs this investigatior.
a.
Repair and return to cervice Makeup and Purification Pump 1C; b.
Repair the faulty valve-position indicator en Sueticn Valve MU-V72C;
.j'kh\\
- r Directorate of Licensing June 21, 197h c.
Counsel the operators who performed the imprcper valve lineup check in the proper procedure for determining valve positions; d.
Analyze the pump centrol logic for pcssible design changes that would prevent the pump from running with 1cv suction pressure.
Of the above recc==endations, a., b., and c. are completed and
- d. is still under investigation.
In addition to the FORC subec==ittee, the Vice President-Generation appointed a special co=mittee to investigate the Makeup and Purifi-cation Pump 1C failure and other related pump failures at D1I-1.
This special ec==ittee reco== ended that a.
the remote valve operator indicators in the valve alley be identified, cleaned, and repaired and that the station imple-ment a comprehensive valve cleaning and lubrication program for major valves in the plant; b.
local rechanical valve position indicators be installed on Makeup and Purification Valves MU-V72A, MU-V723, MU-V72C at the first opportunity; c.
operations personnel be trained and directed to visually ascertain actual valve position when remote position indica-tion is not available; d.
a design review be conducted by Met-Ed and GPU and a protection philosophy be developed for all major pumps.
The Station Superintendent has reviewed and concurred with these recommendations frc= the special cet=ittee and implementation of
- b. is cc=plete. Recc==endations a. and c. are being implemented on a continuing basis and d. is under active review.
(10) Failure Data:
a.
Record of Previous Failures:
Abnormal Occurrence 50-289/Th-9 (Failure of Makeup and Purifi-cation Pump 1A) b.
Equipment Identification:
Makeup and Purification Pump 1C is an eight-stage, Bingham Centrifugal Pump designed for a flow rate of 300 GPM vith a total developed head of 55h5 feet and is used in conjunction with a 700 EP Westinghcuse motor.
Sincerely,
\\48\\
12\\
~
R. C. A'nold r
Vice President-Generation RCA:JF"/: sh
Directorate of Lic - ing h-June 21, 197L c'c : Directorate of Regulatory Operations, Region 1 U. S. Atomic Fnergy Cc=ission 631 Park Avenue King of Prussia, Pennsylvania 19hC6 File 20.1.1
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