05000244/LER-1979-002-03, /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

/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: 05000244/LER-1979-002, Forwards LER 79-002/03L-0 05000244/LER-1979-002-03, /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
References
LER-79-002-03L, LER-79-2-3L, NUDOCS 7901300081
Download: ML17261A102 (2)

LER-1979-002, /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

Event date:
Report date:
2441979002R03 - NRC Website

text

/0 3L-0 U. S. NUCLEAR REGULATORY COMMISSION ENT REPORT (CAR 1205)

(PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

Auxiliary Operator investigated and found A charging pump leaking. (T.B.6. 9. 2.b. 4).

NRC F/'66 79-002 LICENSEE EV CONTROLBLOCK'I I

6 [0Dl] N Y

R E

G 1

QE 0

0 0

0 0

0 0

0 0

Qs 4

1 1

1 1 Q4~ Qs

~ 8 9

UCENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

~ol Eoo'~qE, ~LQE 0

5 0

0 0

2 4

4 Ql 0

1 0

.4 7

9 Qs 0

1 2

4 7

9 Qo 8

BO 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~ot During steady state power o eration o erator noticed lant vent monitors increasin Pump was stopped and isolated, with B and C pumps operable.

Charging pump

~os cylinder was found to be cracked.

~os 7

8 9

80

~oe 7

8 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE Q"

L~JQ>>

L~JQ>>

P U M P

X X 04

~EQis

~Z Qls 9

10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LF RIRO EVENT YEAR REPORT NO.

CODE TYPE NO.

Qll REPoRT ~79

~

~00 2

~W

~03

~L LJ U

21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COhIP.

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 1 2 5 vertical plunger pump with 5 in. stroke.

The cylinder block wa s replaced 3

with a qualified spare

~

7 8

9 FACILITY STATUS

% POWER OTHER STATUS QBO 6

E 26 1

0 0

2e NA IZ3 LJQ ~uQ ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ 6

~Z Q33

~Z Q34 NA 7

8 9

10 44 PERSONNEL EXPOSURES 7

8 9

11 12 13 PERSONNEL INJURIES NUMBER

DESCRIPTION

s

~00 0

Q42 NA 7

8 9

11 12 LOSS OF OR DAhIAGE TO FACILITYQ43 TYPE

DESCRIPTION

~ls Z

Q42 NA 7

8 9

10 PUBLICITY 45 80 80 80 NRC USE ONLY 80 80 METHOD OF DI5 COY E RY DISCOVERY DESCRIPTION Q32

~AQ31 Operator investigation of plant vent 45 46 monitor rise Bo LOCATIONOF RELEASE 036 NA 68 69 80 g PHDNE 7 1 6/546-2700, ext. 2 9 1-2 1 5

l 4 I