ML20129H812

Draft Info Notice 81-40,Potentially Significant Equipment Failures Causing Unnecessary Radiation Exposure to Public Resulting from Drug-Related Incidents

ML20129H812
Person / Time
Issue date:	03/30/1981
From:	Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
Shared Package
ML20129H806	List: IA-85-304, Draft Info Notice 81-40,Potentially Significant Equipment Failures Causing Unnecessary Radiation Exposure to Public Resulting from Drug-Related Incidents ML20129H803 ML20129H807 ML20129H812 ML20129H824 ML20129H827 ML20129H832 ML20129H837 ML20129H841 ML20129H845 ML20129H850 ML20129H855 ML20129H859 ML20129H864 ML20129H869 ML20129H870 ML20129J603
References
FOIA-85-304 NUDOCS 8507200458
Download: ML20129H812 (2)

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t' the scree efechacee 4tial path for less of primary c,oel sne tossen tetsen c. air licensee found that the installed locati systes ta clear.nsi,e,.po..

ant at its Plierts,asu..,

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s scras (AretS) alternate red insertion (AAI) selof control Power.,.

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h sent and drain valves.

enoid valve could cause iticn the sg% the opsn vent and drain valves to thThe less of coolant cou ment drain tank and then to the rea t mt less through the inserted delves co ldc or buitting suso. cter bull, ding e rea to 4 gre pe* drive for 145 u

be a The rate of men vent and drain valves. control red drives)pprominately 500 ype (based t

This less rate is well within the 4250 spethat would be eased by itity of the high pressure coetant injection (NPCI capability of the reacter core isolation coolin

) system. h eter the the loc ps of the CR0 pumps to maintai n level.

g (RCIC) system wou,ld otte nate red insertion installation was completed sg sn e refueling outage ending in Isay 1900.

at the Pilgets gWE emit daaring the air heaser supplying the scras valvesThe installation Pac to that provided t>y the t>ackup scras valve inserting the control rods in the event of This function is 4 reccter protection systee.

s, and it provides a means The testing of the ARI installation atan ATW5 that inc 10 arcarently failed to confire vent and drain valve function.

p ing identification of the potential path for les bcensee reviewed plant procedures t t

ps could be completed, immediate operatar actions d ri o assure that until syntes modift-s of primary caelant.

1 include closin0 the scram discharge ventinstr. menta

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u ng an tin 80 17 and the instrumented volume l It is noted te header in response to

' or operator to the presence of reacter coolant fe11 evel ow tches shov18 alert the itensee modified the syntes during a sch d l oulag ARI actuatten, ase the scras discharge volume vent and dest e u ed outage in Febryary, 1981

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