IR 05000423/1980001
| ML19309E205 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/05/1980 |
| From: | Cerne A, Mcgaughy R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19309E200 | List: |
| References | |
| 50-423-80-01, 50-423-80-1, NUDOCS 8004210011 | |
| Download: ML19309E205 (6) | |
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U.S. NUCLEAR REGULATORY COMMISSION
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OFFICE OF INSPECTION AND ENFORCEMENT
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Region I 50-423/80-01 Report No.
50-423 Docket No.
A CPPR-ll3
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License No.
Priority Category Licensee:
Northeast Nuclear Energy Company P. O. Box 270 Hartford, Connecticut 06101 Millstone Nuclear Power Station, Unit No. 3
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Facility Name:
Millstone Unit 3, Waterford, Connecticut Inspection at:
Inspection conducted:
February 13-15, 1980 k%
3[ 6 O Inspectors:
A. C. Cerne, Reactor Inspector date signed date signed date signed
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Approved by:
Oi/M, MfhW S/f/D q
R. W. McGaughyf Nef, Projects Section
' date signed RC&ES Branch
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f Inspection Summary:
Inspection on February 13-15, 1980 (Report No. 50-423/80-01)
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Areas Inspected:
Routine, unannounced inspection by a regional based
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inspector of welder qualifications, weld rod issue controls, the status of unresolved items, plant inspection-tours, and the conduct of interviews
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of various trades personnel in completion of the trial implementation of
a formal craftsmen interview program.
The inspection involved 18 inspection-hours by one regional based inspector.
Resul ts: No items of noncompliance were identified.
i Region I Form 12 (Rev. April 77)
80042100//
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DETAILS 1.
Persons Contacted Northeast Utilities Service Company (NUSCO)
- R. A. Hastings, Construction QA Specialist H. R. Nims, Director, Generation Construction
- S. R. Toth, System Superintendent / Generation Construction Stone and Webster Engineering Corporation (S&W)
- W. B. Anderson, Assistant Superintendent, Field QC L. J. Barberie, Senior Civil QC Engineer B. L. Holsinger, QC Engineer
- J. G. Kappas, Superintendent of Construction K. Kimball, Mechanical Engineer, Site Engineering Office
- R. H. Lane, Superintendent of Construction Services
- W. MacKay, Resident Manager G. Marsh, Senior Welding QC Engineer
- F. K. Sullivan, Resident Engineer
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G. G. Turner, Superintendent Field QC Graver Tank and Manufacturing Company W. Walker, Site QA Supervisor W. Welch, QA Welding Inspector
- Denotes those present at the exit interview.
2.
Plant Tours The inspector observed work activities in-progress, completed work and plant status in several areas of the plant during general inspections of the plant.
The inspector examined work for any obvious defects or noncompliance with regulatory requirements or license conditions.
Particular note was taken of presence of quality control inspectors and quality control evidence such as i
inspection records, material identification, nonconforming material identification, housekeeping and equipment preservation.
The inspector interviewed craft personnel, supervision, and quality inspection personnel as such personnel were available in the work
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i The inspector specifically noted the installation of Limitorque Valves into a piping system connected to the accumulator tanks within containment. He reviewed an applicable S&W Specification (2282.050-468, thru Addendum 9) and Drawing (FSK-273E, Revision 5)
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and the Westinghouse installation and storage instructions for motor operated gate valves to determine if the governing requirements adequately addressed the scope of the field activities.
The Equipment storage History Card for one of the Limitorque Valves was examined for the listing of applicable storage requirements and the record of completed inspections and checks.
The inspector also observed some stainless steel welding ac'tivities on the pipe spool connections to the reactor coolant pump volutes, and examined the Weld Technique Sheet Wl3B, Revision 1.
Field controls over weld interpass temperatures, specific weld hold
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points, and stored electrode protection were noted. Other areas of inspection during the conduct of various plant tours included a review of engineering approval for an added concrete construction joint with Keyway at the interface of the fuel canal wall and containment liner in the vicinity of the personnel access hatch, and the condition and configuration of various completed welds on the annulus pipe rack framing within containment.
The inspector also confirmed that licensee personnel were aware of the problems associated with overtorquing A-490 bolts used in high strength structural steel connections and was informed that use of such bolts at Millstone 3 was confined to nonsafety-related applications.
No items of noncompliance were identified; however, one item remains unresolved as discussed below.
During examination of the annulus pipe rack framing, the inspector noted that clip connectors had been shop welded to the bottom flange of structural steel support beams with the weld running transverse to the direction of the beam.
Stiffeners had been provided to apparently prevent any buckling of this flange or the introduction of residual stress into the beam.
However, a review of S&W Drawing ES-52F-3 and Thames Valley Steel Detail Drawing Sheet 99, Revision 2, indicates that the gap between the axis of the weld and that of the stiffener is dimensionally less than those noted on at least two specific locations in the field.
Since no tolerance is given with regard to the placement of the stiffener in relation to the weld, the ability of these stiffeners, as located, to accomplish their function is questioned.
Pending engineering review of this situation and the specification of appropriate tolerances, this item is unresolved (423/80-01-01).
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Licensee Action on Previous Inspection Findings (Closed) Unresolved Item (423/79-05-03): ASME code edition applicability.
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The inspector examined documentation indicating a review of the l
differences between the ASME code addenda for Summer 1973 and Winter 1973.
This review concluded that the welding fabrication and installation requirements applicable to Millstone 3 were identical
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in both editions and that the only relevant filler material code
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change appears in the area of Post Weld Heat Treatment, where other S&W filler metal specifications govern and delineate the requirements.
Additionally, a S&W memorandum was issued on February 14, 1980 to notify the responsible home office personnel of the apparent PSAR/ Specification
conflict, so that precise code commitments can be accurately identified
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in the FSAR.
This item is resolved.
(Closed) Unresolved Item (423/79-05-05):
Controls over temporary
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backing ring removal.
The inspector reviewed S&W Engineering and Design Coordination Report E&DCR F-P-2214, approved on August 14,
1979, which revised the S&W piping Specification 2280.000-968 to
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allow the use of non-permanent backing rings with proper controls,
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including NDE of the internal surface after ring removal.
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personnel were also interviewed to determine the existence of
specific inspection hold points, which would preclude backing ring installation and removal without adequate OC checks.
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This item is resolved.
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(Closed) Unresolved Item (423/79-09-01):
Use of dimension attribute in material receiving inspections.
The inspector examined documentation
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of a licensee review of all Category I Receiving Inspection Reports from mid-1974 through 1976.
Although this review revealed a couple
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more documentation errors, these had no impact upon actual material
used in construction.
Also, the results indicated neither a breakdown in QA in this area, nor any specific problem in the use of the
dimension attribute in material receiving inspections.
This item is resolved.
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4 (0 pen) Unresolved Item (423/79-05-04):
Implementation of Westinghouse process specifications: The Westinghouse procedures listed in
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l RESAR-3, Section 5.2.5, and other Westinghouse generic process
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specifications are now available on site.
The inspector selected l
two of these specifications (595150 issued May 25,1970 and 84350
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HA issued May 11,1979) to verify the implementation of their
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j requirements at Millstone 3.
However, the filler metal requirem4nts l
for stainless steel welding in line with Specification 595150 l
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l appear to conflict with those specified in the S&W General Welding
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Procedure for Piping Systems - ASME III (W-100, Section B, Revision
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6). The inspector was informed that representatives of Westinghouse j
had approved of the W-100 procedure for welding on NSSS items.
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This raises a question as to the status of these generic Westinghouse i
specifications in the application of their specific requirements to l
NSSS work at Millstone 3.
Pending clarification as to their status, particularly with regard to those referenced in the RESAR-3 sections
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i which have been incorporated into the Millstone 3 PSAR, this item I
remains unresolved.
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Interviews with Craftsmen The inspector continued the trial implementation of a formal craftsmen
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I interview program, announced to the licensee by letter dated November
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1,1979 and initiated during Inspection No. 50-423/79-12. A total
of seventeen craftsmen were privately interviewed regarding the
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quality of construction, various code requirements, and any irregularities
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they may have noted or concerns they may have about the safety-
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related work in which they are involved.
The confidentiality of i
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all conversations and the anonymity of the source of all discussion items were both stressed and maintained.
L Random craftsmen were selected from the laborer, ironworker, and i
pipefitter trades and the interviews thus concentrated on technical
issues relating to concrete placement, welding, bolting, and material
fabrication and installation.
Specific discussion items amenable
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to immediate inspection follow-up were either brought to the attention
of the licensee for further action, or checked by the inspector
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during additional inspection-tours of the applicable work areas, as warranted.
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i The conduct of all craftsmen interviews to date, imediate and sub-
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sequent follow-up by the inspector, and further discussions with L
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both the licensee and interviewed craftsmen have resulted in the identification of no items of noncompliance.
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5.
Welder Qualification The inspector interviewed personnel and reviewed documents and construction mark-up drawings to verify that accountability and NDE of the containment liner dome seam welds are being accomplished in accordance with the requirements of Regulatory Guide 1.19.
The results of both initial and spot radiography (RT) for each welder by position indicate a reject rate well below that which might either represent an adverse trend or raise a question as to the qualification of the welders or the quality of the welds not subject to radiographic examination.
Review of the subject radiographs by both Graver QC and S&W QC personnel was also verified.
Interviews with both craftsmen and QC personnel revealed that a past problem with a specific lot of low hydrogen electrodes, resulting in deficient welds, had been appropriately identified by both evidence of welder difficulty in making the welds and subsequent RT. Seam weld repair and disuse of the bad quality electrode lot were effected and documented.
No items of noncompliance were identified.
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Exit Interview At the conclusion of the inspection on February 15, 1980, a meeting was held at the Millstone Unit 3 site with representatives of the licensee. Attendees at this meeting included personnel whose names are indicated by notation (*) in paragraph 1.
The inspector summarized the results of the inspection as described in this report.
The inspector also requested to be notified when the Richmond Engineering Company (REC 0) returns to the site for tank fabrication activities and solicited comments from the licensee on the conduct of the formal craftsmen interview program.
No adverse comments were expressed.
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