IR 05000443/1993011
| ML20057G297 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 10/12/1993 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20057G286 | List: |
| References | |
| 50-443-93-11, NUDOCS 9310210239 | |
| Download: ML20057G297 (1) | |
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. Good success was noted in reactor vessel disassembly / reassembly work. The licensee l
Leontracted the services of an individual experienced with this work. A counterbalanced
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rigging technique was developed to minimize the weight the reactor vessel stud exerts on the
g threads during installation / removal and this helps protect the threads from subsequent repairs.
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The licensee putehased a remote-operated reactor vessel stud hole cleaning device as there
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was difficulty removing five studs in OR01. The capability to clean the reactor flanges
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remotely has been purchased for future use.
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, Permanent scaffolding was installed around the pressurizer to facilitate easy access to the
. pressurizer heaters and permanent scaffolding for the Steam Generator (SG) hand-hole
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elevation was under consideration to reduce exposure incurred in SG sludge lancing.
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' Die ALARA Supervisor stated that actual exposures received in conducting MOV surveillances were higher than the established goal due to rework conducted as a result of l
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' deficiencies found during the conduct of the surveillances.
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No dedicated window to emplace shielding in the containment was provided for OR02. The
y licensee d_id not track RWP-hours; the ALARA Supervisor stated that this statistic would not
be particularly beneficial as some work activities were prestaged in the annulus. The
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licensee sponsored several trips to other nuclear stations and Westinghouse in support of
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p ALARA reviews in preparation for OR02.
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' ALARA Program Controls -
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JAs part of this inspection, the following procedure controlling ALAPA planning was j
Jreviewed.
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RP15.1, " Job Preplanning and Review for Radiation Exposure Control," Revision 6, e
s 8/31/92.
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The licensee controlled work by assignmg a cogmzant individual known as the " job
.L supervisor;" this individual was responsible for the overall planning effort associated with
. each particular job. ~ Initially, job supervisors were tasked with initial job scoping and
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acquisition of an initial exposure estimate from the Health Physics Department. The 1 procedure required that the ALARA plan for a job with a sceping exposure estimate of.2.10
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- person-rem receive.h1 approval from the Radiation Safety Committee (RSC). Jobs with a
. scoping exposure estimate.2.1 person-rem but < 10 person-rem required an ALARA review
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but were not required to receive RSC approval. Jobs with an~ exposure estimate of < 1 Lperson-rem did not require preparation of a formal ALARA package; ALARA preplanning was performed and documented through the Radiation Work Permit (RWP) process.
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- Additionally; the following guidance was contained in this procedure. ~ "During the initial y
years of Seabrook. Station op: ration, when radiation fields are low and few jobs are expected to exceed these exposure levels, the Health Physics Department Supervisor may establish 8 '
criteria commensum with planning capabilities."'. No guidance concerning airborne
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