05000346/LER-1979-013-03, /03L-0:on 790116,when Makeup Pump 1 Started for Surveillance testing,1/2 Inch Nipple at Discharge of Attached Gear Driven Lube Oil Pump Failed,Resulting in Oil Spray Which Required Pump Shutdown

/03L-0:on 790116,when Makeup Pump 1 Started for Surveillance testing,1/2 Inch Nipple at Discharge of Attached Gear Driven Lube Oil Pump Failed,Resulting in Oil Spray Which Required Pump Shutdown

ML19269C946
Person / Time
Site:	Davis Besse
Issue date:	02/12/1979
From:	Adams J TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19269C945	List: 05000346/LER-1979-013, Forwards LER 79-013/03L-0 05000346/LER-1979-013-03, /03L-0:on 790116,when Makeup Pump 1 Started for Surveillance testing,1/2 Inch Nipple at Discharge of Attached Gear Driven Lube Oil Pump Failed,Resulting in Oil Spray Which Required Pump Shutdown
References
LER-79-013-03L, LER-79-13-3L, NP-33-79-17, NUDOCS 7902210254
Download: ML19269C946 (2)

LER-1979-013, /03L-0:on 790116,when Makeup Pump 1 Started for Surveillance testing,1/2 Inch Nipple at Discharge of Attached Gear Driven Lube Oil Pump Failed,Resulting in Oil Spray Which Required Pump Shutdown

Event date:
Report date:
3461979013R03 - NRC Website

text

U. S. NUCL E AR b

RC F ORM 366 (7 771 LICENSEE EVENT REPORT g,

CONTROL SLOCK: l l

l l

l l

l (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI I

o FOT110111 in is is 111g1010 l-1010 IN le IP i-10 l a I@l4 11 11 I t i t i@l i

I@

23 26 LICENSL TY PE 40 57 4AI bd LICENSE NVP/dtH I4 IS 7

8 9 LICENSEE COOL l5l0l-l0l3l4l6 Q]Ol1l1l6l7j9l@l012il[2(7l9j@

CON'T

$$RCE !L hl 74 75 HEPORT D ATE 80 C

1 bd 69 EVENT DATE 60 bl COCK ET NVUd ER 7

8 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h a

j l

1727 hours0.02 days <br />0.48 hours <br />0.00286 weeks <br />6.571235e-4 months <br /> on 1/16/79 when Makeup Pump 1 was started for surveillance testing, o 2 lAt the discharge of the attached gear driven lube oil pump failed which l

1o131 1 1/2" nipple at The unit was placed in the Actioni l caused an oil spray requiring shutdown of the pump.

o 4

There was no danger to the health and safety of the l

ITTTl Istatement of Tech Spec 3.1.2.4.

l o Is l lpublic or unit persc..nel.

Makeup Pump 1-2 was operable.

A shutdown of the unit for al (NP-33-7 9-17 )

l iTTTl Ipianned outage was in progress when the event occurred.

1 0

H l

C OP/ P.

VALVE SYSTEM

CAUSE

CAUSE CODE CODE SUSCODE COMPONENT CODE SUBCODE SUBCODE lP lC l@ lE l@ {@ l P ] I P]ElX]Xl@ y @ y @

o 9 18 13 20 7

8 9

to 11 12 la REVISION OCCURHENCE REPOHT SEQUENTI AL CODE TYPE No.

REPORT NO.

@ nu'ER RO l2t ]9l b

ll 3]

y l0 l3 l

]

[__j l0l

_ EVENT YE AR La"g 22 2J 24 26 27 28 2')

JV 31 J2 KEN AC ON O PiANT T J HOURS 22 S 8* IT FOR 1 SUB.

SU PP LI E MANUFACT RER Z@

l_3@

l_0 f0f 0 1 1

l Yl@

llj@

l N lg lB l2l6 0jg X

l l^ l@L j@

l 3/

40 41 42 43 44 47 3J 34 JJ JO CAUSE DESC11PTION AND CORRECTIVE ACTIONS The l

g lThe cause is suspected to be fatigue failure caused by vibration of the piping.

An inspection of lube oil sys-1 g,,ij l nipple and bushing that it threads into were replaced.

g gtems on both makeup pumps was made for evidence of any potential f ailures and none j

lwere found.

, 3 I

g I-80 7

8 9 STA S

• POWER OTHER STATUS IS OV RY OlSCOVERY DESCRIPTION 5011.01 l

[1_lf_j [G_j h l0l0l0ihi NA l

l B [@l Surve111ance Test ST A TIVITY CO TENT LOCATION OF RELEASE AMOUNT OF ACTIVITY RtLF ASED@OF RELE ASE@l11 y

NA l

l NA 1 6 80 44 45 7

8 9 10 PERSONNEL EXPOSURES NUMBE R TYPE

DESCRIPTION

l0l0l0l@lZl@l NA 1 7 PERSONNEL INJu IES NUYBER DE SCRIP TION 1

rrm 1010 in lei NA 80 7

8 9 11 12 LOSS OF CH D AY AGE TO F ACILITY l

TYPE DESCnipTION [2 J @ l NA i

o F

H 9 10

'lhPmn @

7 90 2 210 AW I

11111litIt!I l ',

q a

h-419-259-5000 Ext. 252 DVR 79-020 J"'

• Ad"""

em N e* or pou wn

TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR PONER STATION UNIT ONE i

SUPPLEMENTAL INFOR'fATION FOR LER NP-33-79-17, DATE OF EVENT: January 16, 1979 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Makeup Pump 1 was inoperable The unit was in Hot Standby (Mode 3) with Power Conditions Prior to Occurrence:

(MWT) = 0, and Load (Gross MWE) = 0, Cooldown was in progress.

Description of Occurrence: At 1727 hours0.02 days <br />0.48 hours <br />0.00286 weeks <br />6.571235e-4 months <br /> on January 16, 1979, Makeup Pump 1 was started for an operational test in accordance with ST 5011.01, " Boron Injection Flowpath Test".

Failure of a 1/2" nipple at the discharge of the attached gear driven lube oil pump caused an oil spray which required shutdown of the pump.

At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br />, Makeup Pump 1 was declared inoperable. The unit was placed in the two Makeup Action Statement of Technical Specification 3.1.2.4, which requires that Pumps be operable in Modes 1, 2, 3, and 4 (Mode 4 with Reactor Coolant Systen pres-sure 7150 psig). The Action Statement requires that the inoperable pump to be in an operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or the unit be in Hot Standby (Mode 3) within the next six hours.

Designation of Apparent Cause of Occurrence: The cause of the failure of the pipe Proper nipple is suspected to be fatigue failure caused by vibration of the piping.

materials were installed, and there is no visual evidence of improper installaticn or any excessive mechanical force.

There was no danger to the health and safety of the public Analysis of Occurrence:

or to unit personnel. Makeup Pump 2 was operable. A shutdown of the unit for a The unit went into Mode 5 planned outage was in progress when the event occurred.

(cold shutdown) at 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br /> on January 17, 1979.

Corrective Action

On January 18, 1979, under Maintenance Work order 79-1298, the nipple that f ailed and bushing that it th cads into were replaced. An inspection of lube oil systems on both makeup pumps was made for evidence of any potential failures and f ound none. After satisfactory completion of ST 5011.01, on Makeup Pump 1, the pump may be declared operable, removing the unit from the Action State-ment of Technical Specification 3.1.2.4.

Although there have been previous reports concerning lube oil leaks, oil leak outboard Failure Data:

oil leak inboard deflector disc and NP-33-7/-073 -

(NP-33-78-107 -

bearing end plate), this is the first occurrence of a piping failure.

LER #79-013