ML19095A612

Submit Licensee Event Report No. USRE-S1-76-07 Re Observation of Water Coming Out from No. 19 Cylinder

ML19095A612
Person / Time
Site:	Surry
Issue date:	07/29/1976
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/RGN-II
References
Serial No. 160 LER 1976-007-00
Download: ML19095A612 (3)

Text

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-., Mr. No~a~ .c. M~s-~'l~y~ Dir~*~:tor

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sefial No~ .160 *

"Office of* Inspection and: Enforcement * * -.  :-P08M/LJC:jlf *

. u~ s~* Nttclear *Regulat'ory Con:mis~i~n . *. I

• Region IL~- Suite 818

• Docket ~o.. 50-280 23():Peachtree St~eet, Northwest 'I~icense No *. DPR-32. _

• . Atlanta_, ; Georgia * . 30303 , .

Dear Mr.Mosel~y:

. -'.' Pursua~t.** to Su~ry. P~wer .St~tion 1'echnicai S-pecificatfon. 6. 6.:Ei. 2, the

. Vitgiriia Electric arid Power. Company hereby. sµbmits .a copy of* Licensee Event .

Report ~o~ iJSRE-Sf-76-07~. * * , .

• . the' substance '~f -this irepo:rt ih~~. be~n revJew~d by 'the Station Nuclear Safety and Operating, C~ttee:*:ana- will ,be placed ori-*.the a_genda for the 'next meeti,ng of .

the System Nuclear' sS.f~ty

• ~* . and Operating.

. ., . Conmittee~*. *..

.*.**, Very' . truly . : .

.yotirs,.

C~ J1. St.aliings

• _ .

Vice Presid~nt~Power Stippt'y .

• • and Production Operatfons '.

I

'Ericl'osur~' . ** I cc:** Mr,. *Robert W.* .Reid,>* chief _(40 copie~)

Operating Rea.ctors Branch 4.

. !r'~.  :t.,, **

• • • itto~b

LICENSEE EVENT REPORT

, CONTROL BLOCK:,- ** , , , , [PLe PRINT ALL REQUIRED INFORMATION) 1 6 LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE

_@E]

7 B9 I VIA Is Ip I s 1114I 15I o I o I.,. . I oIo I o I o I o 1-1 QlQJ 25

[ 4 I 1I 1f 11 al Io I 332I 26 30 31 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE 7

@E]coN'T B

I MI I I LLJ 57 58 59 w60 I ol 51 ol-10!218 !o I lo!7!ol2!1!6l IOl712l717l6!

61 68 69 74 75 80 EVENT DESCRIPTION

@Ifil !During the preparations to run the starting test of #1 emergency diesel generator,water!

7 B 9 80

~ !was observed coming out of #19 cylinder. The backup emergency diesel generator was I

.7 8 9 BO

~ !immediately tested satisfactorily and then repairs commenced on #1 emergency diesel I 7 8 9 80

~!generator.The engine was repaired by replacing the cylinder head and head gasket.

• 7 B 9 I

80

&1§] !This is a reportable occurrence in accordance with Technical Specification (Continued) I 7 B 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION

@El IE IE I 7 8 9 10 LlJ 11 IE I NI G I I IN IE I 12 17 LAJ 43 IE I 114 17 I 44 47 w48 CAUSE DESCRIPTION

~ jEMD-GM Turbo Vee 20, 3810 Bhp diesel engine was found to have q crack in #19 cylinder I 7 B 9 80

~ !head which extended between two exhaust valve seats and into the water jacket. Thus I 7 B 9 80 IT@] !water from the cylinder head water jacket *was permitted to drip into the (Continued) I 7 B 9 80 FACILITY. METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION EE]

7 8 w

9 I1 10 IO I O I 12 13

_IN~/A_ _ ____.

44 w I 45 46 N/A 80 FORM OF ACTIVITY CONTENT rn RELEASED OF RELEASE AMOUNT OF;ACTIVITY LOCATION OF RELEASE W lzJ ..__!_._N.......

IA_.____ _ .. _ ____. N/A 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~ 10 IO I b I LU _N'-/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___.

7 8 9 11 12 13 BO PERSONNEL INJURIES NUMBER DESCRIPTION EE]lololol 7 a9 11 1....

2_ NA

__._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _0_,o OFFSITE CONSEQUENCES rn 7 8 9 N/A 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION

~~ ~N~/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___,

7 8 9 10 80 PUBLICITY

[Tifl N/A _J 7 8 9 80 ADDITIONAL FACTORS

~ !The backup emergency diesel generator was demonstrated to be operable. Therefore, the I 7 8 9 80 illfil !safety systems would have functioned if they had been required .. (Continued) 7 8 9 80 NAME: _ _ T_._L_._B_a_uc__o_m______~ - - - ~ - - PHONE: (804) 357-3184 GPO 8 81*66 7

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• e EVENT DESCRIPTION(CONTINUED) 6.6.2b(2). (USRE-Sl-76-07).

CAUSE DESCRIPTION (CONTINUED) cylinder. Rolling the engine with the cylinder test cocks open prior to start-ing the engine forced the water out of the cylinder. This permitted detection of the problem and prevented further damage to the engine.

This is the fifth cylinder head on this engine to be found with a crack in a time period of approximately three months. Cylinders #1 and #17 were the subject of II USRE Sl-76-04 and 06. Cylinders #2 and #16 were found during the inspection con-ducted a:s a result of USRE Sl-76-06. Cylinders #1 and #2 are diametrically oppo-site of cylinders #16, #17 and #19. This can be indicative of a cylinder head I heat stress which is caused by a cylinder heat imbalance or an engine overheat condition.

To ensure the reliability of this engine, the monthly performance test will be It conducted on a weekly basis for a period of two months. If no additional cylinder 1:

heads are found to be cracked, it will be safe to assume the remaining heads have 11 not been heat stressed to the point of failure. If additional headi are found to I, be cracked, the determination of the cause of the cracking may be brought to. light i ',

depending on which head fails.

ADDITIONAL FACTORS (CONTINUED)

Accordingly, no hazard to the safety or health of the general public exist~d.

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