ML17261A102

LER 79-002/03L-0 on 790104:during Steady State Power a Charging Pump Leaked & Found to Be Cracked.Caused by Fatigue Cracking Due to High Loop Stresses Generated in Compression Stroke of Piston in Cylinder

ML17261A102
Person / Time
Site:	Ginna
Issue date:	01/24/1979
From:	Spector S ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17244A342	List: ML17244A341 ML17261A102
References
LER-79-002-03L, LER-79-2-3L, NUDOCS 7901300081
Download: ML17261A102 (2)

Text

NRC F/'66 79-002 /0 3 L-0 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EV ENT REPORT CONTROL BLOCK'I I 6 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

(CAR 1205)

[0Dl] ~ 8 9 N Y R UCENSEE CODE E G 1 14 QE 15 0 0 0 0 0 LICENSE NUMBER 0 0 0 0 25 Qs 26 4 1 1 LICENSE TYPE 1 1 30 Q4~ 57 CAT 58 Qs CON'T

~ol 8 Eoo'~qE, ~LQE 61 0 5 0 0 0 2 4 4 Ql 68 69 0 1 0 EVENT DATE

.4 7 9 Qs 74 75 0 1 2 REPORT DATE 4 7 9 80 Qo BO DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~ot During steady state power o eration o erator noticed lant vent monitors increasin Auxiliary Operator investigated and found A charging pump leaking. (T.B.6. 9. 2.b. 4) .

Pump was stopped and isolated, with B and C pumps operable. Charging pump

~os cylinder was found to be cracked.

~os 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

~oe Q" L~JQ>> L~JQ>> P U M P X X 04 ~EQis ~Z Qls 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Qll LF RIRO REPoRT ACTION FUTURE EVENT YEAR

~79 21 22 EFFECT

~

23 SHUTDOWN

~00 24 REPORT NO.

2 26

~W 27 ATTACHMENT

~03 28 CODE 29 NPRDQ

~L TYPE 30 LJ 31 PRIME COhIP.

U N O.

32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER Qls ~QER QJQ20 L~JQE 0 0 0 0 +NQ22 ~YQ24 N Q25 A 1 5 0 Q24 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o The apparent cause of failure is fatigue cracking due to high hoop stresses generated in the compression stroke of the piston in the cylinder. The unit is an Ajax Iron Works triplex T 125 vertical plunger pump with 5 in . stroke . The cylinder block wa s replaced 3 with a qualified spare ~

7 8 9 80 FACILITY METHOD OF IZ3 LJ6 STATUS E Q ACTIVITY 26

~uQ 1

CONTENT

% POWER 0 0 2e OTHER STATUS QBO NA D I 5 COY E R Y

~AQ31 45 46 DISCOVERY DESCRIPTION Q32 Operator investigation of plant vent monitor rise Bo 6

RELEASED OF RELEASE

~Z Q33 ~Z AMOUNT OF ACTIVITY NA Q LOCATION OF RELEASE 036 NA Q34 7 8 9 10 44 45 80 PERSONNEL EXPOSURES 7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION s ~00 0 Q42 NA 7 8 9 11 12 80 LOSS OF OR DAhIAGE TO FACILITY TYPE DESCRIPTION Q43

~ls 7 8 9 Z Q42 10 NA 80 PUBLICITY NRC USE ONLY 68 69 80 g PHDNE 7 1 6/546-2700, ext. 2 9 1-2 1 5

l 4 I