05000366/LER-1980-138-03, /03L-0:on 801027,leakage on Torus Purge Inlet Outboard Isolation Valve 2T48-F324 Found Such That Test Vol Could Not Be Pressurized.Caused by Worn O Rings.Shaft & Housing for O Rings Cleaned.O Rings Replaced

/03L-0:on 801027,leakage on Torus Purge Inlet Outboard Isolation Valve 2T48-F324 Found Such That Test Vol Could Not Be Pressurized.Caused by Worn O Rings.Shaft & Housing for O Rings Cleaned.O Rings Replaced

ML19345B432
Person / Time
Site:	Hatch
Issue date:	11/20/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B431	List: 05000366/LER-1980-138, Forwards LER 80-138/03L-0 05000366/LER-1980-138-03, /03L-0:on 801027,leakage on Torus Purge Inlet Outboard Isolation Valve 2T48-F324 Found Such That Test Vol Could Not Be Pressurized.Caused by Worn O Rings.Shaft & Housing for O Rings Cleaned.O Rings Replaced
References
LER-80-138-03L, LER-80-138-3L, NUDOCS 8012010314
Download: ML19345B432 (2)

LER-1980-138, /03L-0:on 801027,leakage on Torus Purge Inlet Outboard Isolation Valve 2T48-F324 Found Such That Test Vol Could Not Be Pressurized.Caused by Worn O Rings.Shaft & Housing for O Rings Cleaned.O Rings Replaced

Event date:
Report date:
3661980138R03 - NRC Website

text

Griii'~~~

LICENSEE EVENT REPORT cor4T Rol BLOCK:

l l

l l

l l@

(PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI Lnh I r I 1 I d2JG10 l o I 1010101010 l-1010 l@!411 11 1111 l@l I

I G).

o i 7

8 9 LICENSEE toot 14 t$

LILLNSE NUMeLH 25 20 LICLNSE lYPE Jo

$ 7 C A I S3

$",$E' W@l0 l 5 l 010 l 0 l 3 l 6 l 6 l@l 1 l 0 l 2 l 7 l 8 l O'l@l1 l1 12 l 0]810 l@

?

8 00 til DOCKE T NUMDE H bei 03 EVEN1 DAIE 14 75 HEPQHi DATE 80 EVENT DESCHIPTION AtJD PROBA0LE CONSEQUENCES h 10121 lJln lo-2 3-80aith_the reactor oower at 2278 MWt. an LLRT of the torus 1

to_jm Lpurge inlet outboard isolation valve 2T48-F324 shaft "0"

ring seals was i 1o141lperformed.

On 10-27-80, the leakage was determined to be such that the I

[ test volume could not be pressurized; therefore, it must be assumed that]

o 5 lo Ic i I the.60 La overall allowabli leakage rate of Tech Specs 3.6.1.2.B.1 l

10171 (could have been exceeded.

This is a repetitive occurrence - see LER

[

10181 L50- 366/1980-0 51.

There were no effects on public health and safety.

I 60 7

89 C DE CODE SUBCO E COMPONENT CODE SUSC DE S

000 lo19]

1 S l E l @ LE_j @ l F l @ l V l A l L l V l E l X l@ l B l @ [GJ @

7 8

9 10 Il 1/

13 18 l 'J 20 SE QUE N TI AL OCCURRENCC HEPORT REVISION

__ EVENT YE AR RE POHT NO.

CODE TYPt N o,

@,g(E p.go1810l l-l l1l3l8l y

l0 13 l [LJ l.--.I O

p,1, 21 22 23 24

/G 27 26 29 30 31 J/

AK r A 1 0 PL T

1E14 )

HOURS 27 St 0 t D

FO bL b.

5 PPLIE MAN FA TL En

() lA lgl34Zl@

lZjg W @

l0l0l0l l gg lY lg l Alg lF l1 l3 l0 lg

'd 33 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTloN AND CORRECTIVE ACTIONS l3lolIThe leakage was due to worn "0"

rings.

The shaft and housing for the I

l"0" rings were cleaned, and the "0"

rings were replaced.

The torus I

i i l purge inlet outboard isolation valve 2T58-F324 "0"

rings were then re-l i,igj li l3l l tested, and the retest leakage was 0 accm.

(

I rl41 I i

7 8 9 80 51 3

% POWEH OTHE FI ST ATUS DISCO FY DISCOVEHY DESCniPTION LIJO I o I o I 4 l@l NA l

W @l Perform LLRT l

i s t. Cit VIT Y CO TENT nctE Aseo Or HELE ASE AMOUNT OF ACTIVITY LOCA110N OF HELE ASE [L] @ []_J@l NA l

l NA l

i 6 7

8 9 10 11 44 45 80 P( RSOWE L E xPOSURLS NUMat n TYPE CE SCRIP TtON l1 l 7l 10 l0 l0 l@l Zl@l NA l

,t nsONNa',~,Ud, ES otSCn.PnON@

NUMe,n 101010 l@l NA l

i a 7

8 9 11 12 80 L OSS OF On DAMAGE TO FACILITY TYPE

()E SC HIP T ION v

1Zl@l NA l

80 7

8 9 10

'ggj""">"

801201ON NA PUH1 tCIT Y NRC USE ONL Y l

lllllll1l[Iil!

, o 68 6 'J 80 E 7

H U 10 912-367-7781 N,

NAME OF PREPAREn C I Cnggin. Supt. Plt. Fng. Ser.v.

PHONE:

5

~

o 4

Il V

LER #:

50-366/1980-138 Licensec:

Georgia Power Company Facility Name; Edwin I.

llatch Docket #:

50-366

Narrative

Report for LER 50-366/1980-138 On 10-23-80, with Unit 2 at steady state power operation at 2278 MWL, an LLRT by procedure llNP-2-3952, " primary Contain-ment Periodic Type B and Type C Leakage Tests", was performed on the torus purge inlet outboard isolation valve 2T48-F324 shaft "0"

ring seals.

On 10-27-80, the LLRT coordinator reviewed the results of the LLRT in which the "0"

ring seals were found to be Icaking such that the test volume could not be pressurized; therefore, it was assumed that the

.60 La overall allowable Icakage rate of Tech Specs 3.6.1.2.B.1 would have been exceeded.

Primary containment integrity was not compromised because torus and drywell purge inlet line isolation valves 2T48-F307 (inboard),

F308 (outboard),

F309 (outboard) were already closed; in addition, these valves were pJ subsequently tagged,in the closed position to ensure the valves could not be operated thereby ensuring primary contain-ment integrity per Tech Specs 3.6.1.1 until the torus purge inlet outboard isolation valve 2T48-F324 "0"

ring seals could be repaired.

This is a repetitive-occurrence; refer to LER 50-366/1980-051.

There were no effcets on public health or safety.

The leakage of the torus purge inle inboard isolation valve was caused by worn "0"

ring seals.

addition rust, paint, and burrs were removed from the shaft on hich the "0"

rings are mounted, and the "O"

ring housing was cleaned.

Then the "O"

rings were replaced.

The "as found Icakage" could not be measured due to the fact that the test volume could not be pressurized.

After the indicated corrective maintenance, a

retest was performed, and the Icakage value

("as Icft leakage") was 0 acem.

o O