PNO-IV-97-063, on 971029,incident Resulting in Potential Exposure in Excess of Regulatory Limit Occurred.Gauge Mfg Notified of Incident.State of CA Provided NRC Info Regarding Event

PNO-IV-97-063:on 971029,incident Resulting in Potential Exposure in Excess of Regulatory Limit Occurred.Gauge Mfg Notified of Incident.State of CA Provided NRC Info Regarding Event

ML20212D270
Person / Time
Issue date:	10/30/1997
From:	Hackney C, Linda Howell NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
To:
References
PNO-IV-97-063, PNO-IV-97-63, NUDOCS 9710310052
Download: ML20212D270 (1)

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@ I.. Oct::ber 30,1997 Wy L ^ 7 ppm ma! NARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-IV 97-063 20 g

M' (Thisheliminary notification constitutes EARLY notice of events of POSSIBLE

.,.safet'y or public interest significance. The information is as initially p

received.wlthout verification'or evaluation, and is basically all that is -

known byLRegipn IV staff in Arlington, Texas on this date. -

- Facility

. Licensee Emeroency Classification rg"

Manson Construction & Engineering Co.-

Notification of Unusual Event

^

~ Manson Construction & Eng. Co..

Alert

-1605 Pier D Street a:

Site Area Emergency Long Beach,Californias General Emergency.

X Not Applicable i

s I

Subject:

' INCIDENT RESULTING IN POTENTIAL EXPOSURE IN EXCESS OF 1 REGULATORY LIMIT -

4 M

NRy facsimile transmittal dated October 29,1997, the California Radiologic Health Branch

fCRHB) Informed the Office of State Programs and Region IV of an incident involving an

' inadvertent exposur n

CRHB reported that an employee of Manson. Construction & Engineering Co., Long Beach, California, was removing a Texas Nuclear Model 5409 pipe gauge, containing 2.8 curies of ceslum-137, from a barge for. service when the exposure occurred. The individual believed 4

m

-that hehad closed the shutter prior to removing the gauge, but after working with the gauge M'

for4 W

- E a period of time, he realized that the shutter had remained in the open position. The individual 4

.~ worked with the gauge for approximate!v 30 minutes and based on an evaluation performed

.by CRHB, the dose received.by the individual was estimated to be 4.7 rems. A second

Individual was also reported to have worked in the vicinity, although he was present for a sh' rter period of time and was at a greater distance from the source. A dose estimate for o

1the second individual was not yet available, ra

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CRHB has directed Manson Construction & Engineering to obtain the services of a consultant R

fto complete a review of the incident and perform dose assessments for both indMuals. The

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gauge manufacturer has been notified ~of the incident and will perform an examination of the 1 shutter mechanism to determine the cause of its failure to close.

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The.' state of California provided NRC information regarding this ever.t.

< Region.IV received notification of this occurrence by facsimile from CRHB on Octcher 29. -

- Region IV has informed NMSS. -

LThis information-bas been. discussed -with the state and is current as of 12:00 p.m.,

LOctober 30,1997.

(Contact: Charles A. Hackney' Linda Howell

-(817)860-8267 (8171860-8213 Mh/b5

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