ML19345G095

RO 76-05:on 760419,temporary Plug Not Installed in 2-inch Diameter Hole Drilled in Refuel Bldg Wall as Part of Seismic Mod.Caused by Personnel Failure to Follow Written Instruction to Plug Hole Shortly After Drilling

ML19345G095
Person / Time
Site:	Humboldt Bay
Issue date:	05/03/1976
From:	Jeffery Wood PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-76-05, RO-76-5, NUDOCS 8103020243
Download: ML19345G095 (1)

Text

LICENSEE EVENT REPORT \\

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(PLEASI PRINT ALL REQUIRED INFORMATION) 1 6

NAME LICENSE NUMBER ypg Ty 0

lC l A lH l Ml Bl 1l l0 l0 l-l 0 l 0l 0l 0l0 l-l0 l0 l l4l1l1l1l1l l 0l1 l 7 89 14 15 25 26 30 31 32 CATEGORY T PE oOCKET NUMBER EVENT DATE r*EPoRT DATE O 1 CON'T l D l I l W y l0 l5 l0 l-l0 l1l 3l 3l l0 l4 l1 l9 l 7 l 6 l l0 l5 l0 l3 l 7 [ 6 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION gg l During normal operation secondary containment required by the Technical Specificationq 7 89 80 gl III.B.8. was lost for several hours when a temporary plug was not installed in a l

80 7 89

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seismic l

E[ l two inch diameter hole drilled in the refuel building wall as part of 7 89 80 3E I a gtfications. The special building leak rate test detected the problem and the l

7 89 80 gg l hole was plugged. Backup secondary containment is not available.

l 80 7 89 mg

$E CODE COMPONENT CODE SA R MANUF R

VOLAT 1DN

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7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION gg l Personnel error.

Failure to follow written instruction to plug hole shortly l

7 89 80 g[ l af ter drilling.

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's't aNs' o$dEo$tR$

% PowtA 01HER S1 Alus DiscosEm DEscwtsoN y

l 0l 8l 5l l NA l J lSpecial Refuel Building 1.eak Test l

1 7 8 9

10 12 13 44 45 46 60 RELE SED CF ASE AMOUNT OF ACINt1Y LOCATON OF RELEASE DE Lz.J LZJ l

NA I

I NA I

7 8 9

10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTON DE P I 0101

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7 89 11 12 13 80 PERSONNEL INJURIES i

l NuMeta ce scarT ON gg l 0l0 l0 l l

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7 89 11 12 80 OFFSITE CONSEQUENCES DE I NA l

7 89 80 LOSS CR OAMAGE TO FACILITY i

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7 89 10 F30 nuoi cit y l NA l

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/ 09 HO ADDITIONAL F ACTORS gg l Event Description (cont) Third occurrence: re fer to 1.ER 76-02 and 76-03.

100%

j 60 7 8 %urveillance provided by QC inspector. Each plug is tagged as it is installed then gg linstalled plugs checked for tightness at end of work period (4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> rmv.) 1.En 76-05 ]

l 7 8V uH J. W. WOOD 707-443-2787 NAME PHONr

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