ML19095A611

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

ML19095A611
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: ML19095A611 (3)

Text

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VIRGINIA ELECTRIC AND PowER COMP.A.NY RICHMOND, VIRGINIA 23261 July 29,

• 1976 Mr. Norman c. Moseley, D.irector Office of Inspection and Enforcement

u. s. Nuclear Regulatory Commission Region II - Suite 818 Docket No. 50-280 230 Peachtree Street, Northwest License No. DPR-32 Atlanta, Georgia. 30303

Dear Mr. Moseley:

Pursuant to Surry Ppwer Station Technical Specification 6.6.Bo2, the Virginia Electric and Power Company hereby submits a copy of Licensee Event Report No. USRE-Sl-76-07.

The substance of this report has been reviewed by the Station Nuclear Safety and Operating Committee and will be placed on the agenda for the next meeting of the System Nuclear Safety and Operating Committee.

Very truly yours,

c. M. Stallings Vice President-Power Supply and Production Operations Enclosure cc: Mr. Robert w. Reid, Chief (40 copies)

Operating Reactors Branch 4

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.ICENSEE EVENT REPORT ft

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• CONTROL BLOCK: I I I I I I I [PLEASE PRINT ALL REQUIRED INFORMATION) 1 6 LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE

@El 7

I VIA 8 8 Is Ip I s I 114I 15 I o I o 1-1 ol o I o I o I o 1-1 ql_QJ 25 14 26 I 11 1 I 11 ol 30 Io 31 I 332I REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE 7

@E]coN'T 8

I MI I I 57 58 LLJ 58 w

60 I o I 5 I o I- I o I2, I 8 I o I IOl7!0l217!61 6\ 68 68 74 IOl7121717!61 75 80 EVENT DESCRIPTION

~ !During the preparatiorts to run the starting test of #1 emergency diesel generator,waterJ 7 8 8 80 7

@:§] !was observed coming out of #19 cylinder. The backup emergency diesel generator was 8 8 80 I

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

@:Ifil jgenerator. The engine was repaired by replacing the cylinder head and head gasket. I 7 8 8 80

~ !This is a reportable occurrence in accordance with Technical Specification (Continued) I 7 8 8 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION 7

@0 IE IE I 8 8 10 uJ11 IE I NI G I I IN IE 17I 12 L8J 43 IE 44 I 114 17 47I lJiJ 48 CAUSE DESCRIPTION

@I@ JEMD-GM Turbo Vee 20, 3810 Bhp diesel engine was found to have a crack in #19 cylinder I 7 8 8 80

~ !head which extended between two exhaust valve seats and into the water jacket. Thus I 7 8 8 80 E:@I !water from the cylinder head water jacket was permitted to drip into the (Continued) I 7 8 8 80 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION 7

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8 LIJ 8

I1 Io Io 12I 13I N/A 10 I

44 w45 46 N/A 80 FORM OF ACTIVITY CONTENT LOCATION OF RELEASE rn w RELEASED OF RELEASE AMOUNT OF;;ACTIVITY lzJI. . . .__,N~/.L.L.A_ _._.._ _____. N/A 7 8 8 10 11 44 45 80 PERSONNEL EXPOSURES

. NUMBER. TYPE DESCRIPTION ITEl8 1010101 LU -~N......

/_A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____.

7 8 11 12 13 60 PERS.ONNEL INJURIES NUMBER DESCRIPTION 7

rna ,o Io I o 1 . _ _ _ - ' - N " " " " ' A ~ - - - - - - - - - - - - - - - - - - - - - - - - - '

8 11 12 80 OFFSITE CONSEQUENCES

-~ N/A 7 8 8 80 LOSS DR DAMAGE TD FACILITY TYPE DESCRIPTION (2))ll.J ~N~/A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _____,

7 8 8 10 80 PUBLICITY

@?] N/ A _J 7 8 8 80 ADDITIONAL FACTORS

~ !The backup emergency diesel generator was demonstrated to be operable. Therefore, the I 7 8 8 80 GE) !safety systems would have functioned if they had been required .. (Continued) 7 8 8 80 NAME: T. L. Baucom PHONE: (804) 357-3184 GPO 881

• 667

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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 USRE Sl-76-04 and 06. Cylinders #2 and #16 were found during the inspection con-ducted as 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 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 conducted on a weekly basis for a period of two months. If no additional cylinder heads are found to be cracked, it wi 11 be safe to assume the remaining heads have not been heat stressed to the point of failure. If additional headi are found to be cracked, the determination of the cause of the cracking may be brought to light depending on which head fails.

• ADDITIONAL FACTORS (CONTINUED)

Accordingly, no hazard to the safety or health of the general public existed .

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