ML20042B652
| ML20042B652 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 03/05/1982 |
| From: | Lester Tripp, Varela A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20042B638 | List: |
| References | |
| 50-293-82-07, 50-293-82-7, IEB-80-11, NUDOCS 8203250487 | |
| Download: ML20042B652 (4) | |
See also: IR 05000293/1982007
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U. S. NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
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Region I
Report No. 50-293/82-07
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Docket No. 50-293
License No. OPR-35
Priority
--
Category
C
Licensee: Boston Edison Company
800 Boylston Street
Boston, Massachusetts 02199
Facility Name: Pilgrim Nuclear Power Station, Unit 1
Inspection at: Plymouth, Massachusetts
Inspection conducted:
February 9-12, 1982
Inspector:
[h
f!<? Z.
. A.~VaM la, Reactor Inspector
dat'e signed
Approved by.
[., h
MI[8f.
- L. E. T/i/pp, Chief, Material- and
~ da'te signed
Processes Section, EIB
Inspection Summary:
Inspection Report No. 50-293/82-07
Area: A special announced inspection by a regional based inspector of the licensee
activities in response to IE Bulletin No. 80-11, Masonry Wall Design and observation /
review of modifications to masonry walls.
The inspection involved 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> on-
site by one regional based inspector.
Results:
No items of noncompliance were identified.
8203250487 820309
PDR ADOCK 05000293
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DETAILS
1.
Persons Contacted
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BECO
D. Buckley, Senior Engineer, Systems and Safety
J. Caughlin, Nuclear Engineering De artment
r
G. W. Campbell, Senior Construction Engineer
B. Damon, QA Rer.ords Manager
R. Grazio, Project Engineer
- W. D. Harrington, Senior Vice President
D. Harvey, Senior Engineer, Systems and Safety
- R. D. Machon, Nuclear Operations Manager
- M. T. McLaughlin, Senior Compliance Engineer
- N. H. Williams, Project Manager
- J. R. Johnson, Senior Resident Inspector
H. Eichenholz, Resident Inspector
- denotes persons present at exit interview.
2.
Structural Integrity of Concrete Masonry Walls
a.
Verification of Licensee Actions in Meeting Requirements of IE
Bulletin No. 80-11
Based on the inspector's review of the licensee's formal responses to
the NRC on Concrete Masonry Walls, Bulletin No. 80-11, interviews with
r..ponsible licensee personnel and evaluation of the prioritized
program for re-evaluation of the unusually large number of masonry
walls, the inspector concluded that BECO conformed with the requirements
of the Bulletin.
The inspector ascertained by interviews with cognizant licensee personnel
that, of 421 masonry walls at Pilgrim 1 Station, 231 were categorized
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as safety related and re-evaluated for design adequacy. The licensee
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prioritized program of analysis disclosed sixteen of these walls which
did not qualify and fifteen others classified as stable were structurally
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marginal. The inspector was informed by the licensee that advantage
was taken of the present facility outage to modify anchorage of the
latter and thereby restore them to an acceptable design safety margin.
Of the sixteen walls without sufficient design safety margin, eight were
unstable (would not maintain structural integrity during certain
postulated loading event (s)). These were further analysed by licensee
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procedure, Block Wall Failure Effect Evaluation. As a result, walls
found unstable were reported to the NRC by Licensee Event Reports 81-
054/01T-0 through -5.
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b.
Modifications to Masonry Walls
The inspector reviewed with the licensee
outage related Contingency
Plans for Structural Modifications to' Masonry Walls and observed that
modifications to all unstable walls identified in LER 81-054/01T were
completed. The inspector was informed by the licensee that QC close-
out of these modifications is necessary to remove them from the
" unstable" condition. Walls lacking final QC inspection are considered
unstable, consequently this could prevent plant start-up. At the time
of this inspection, incomplete work existed on other related walls
that were scheduled in the same PDCR #81-53 for modifications during
the current outage to restore them to an acceptable design safety
margin. The licensee informed the inspector that they will complete
all modifications and provide QC close-out for all outage related
walls prior to start up.
The total number of walls in the outage
related package is 30. Additionally, one stable wall is identified
for post outage structural modification.
c.
Observation and Record Review of Masonry Wall Modifications
The inspector accompanied the licensee project manager to observe
outage related modifications to accessible masonry walls.
In another
tour with the licensee senior construction engineer, the inspector
observed other outage related modifications.
Six of the thirty-one
walls in the modification package PDCR #81-53 were observed, two of
which were originally unstable with modifications completed, two
structurally marginal walls with improved anchorages and two marginal
walls undergoing modifications. The significance of the modifications
to unstable walls was noted by the inspector for extent of the fix,
the general appearence of workmanshop and evidence of quality control.
Documentary evidence of quality control of completed modifications was
sampled in records for another unstable wall.
These were observed to
be readily retrivable, legible and evidence design review and approval
of field revisions by the licensee's on-site group-leader for design
approval,
d.
Review of Quality Assurance Program Manual for Modifications
Masonry wall modifications are being performed by licensee contract
groups, two of which conduct their work under the Boston Edison QA
program and the third, Reactor Controls Incorporated, working under
their own project program manual. The inspector observed the RCI
QA/QC progtam manual to be approved by BECO, to be technically competent
and adequately integrated.
The governing code for the quality aspects
of the manual is ANSI 45.2.
No items of noncompliance were identified.
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3.
Exit Meeting
The inspector met with licensee senior vice president and members
of his staff (denoted in paragraph 1) at Pilgrim Nuclear Power
Station, Plymouth, Massachusetts at the conclusion of the inspection
on February 12, 1982. The inspector summarized findings of the
inspection. The licensee acknowledged the inspector's coments,
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