IR 05000416/1978020
| ML19263B642 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 12/13/1978 |
| From: | Conlon T, Vandoorn T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19263B637 | List: |
| References | |
| 50-416-78-20, 50-417-78-20, NUDOCS 7901220300 | |
| Download: ML19263B642 (4) | |
Text
W.
sk* #f Coq'o, UNITED STATES
NUCLEAR REGUi.ATORY COMMISSION
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g REGloN 11
r.g 101 M ARIETTA STREET. N.W.
ATLANTA, GEORGIA 30303
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Report No.: ~50-416/78-20, 53-417/78-20 Docket Nos.: 50-416 and 50-417 License Nos.:
CPPR-118 and CPPR-119
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Category:
A2, A2 Licensee: Mississippi Power and Light Company Facility Name:
Grand Gulf Nuclear Station, Units I and 2 Inspection at:
Port Gibson, Mississippi Inspection conducted: November 28 - December 1, 1978 Inspector:
P. K. VanDoorn Reviewed by:
.
- M[s<W (
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/# /8 T. E. Conlon, Chief
/Dat6 Engineering Support Section No. 2 Reactor Construction and Enginecring Support Branch Inspection Summary
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Inspection on Nosember 28 - December 1, 1978 (Report Nos.
)
50-416/78-20 and 50-417/78-20)
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Areas Inspected: Routine, unannounced inspection of reactor vessel internals installation; reactor vessel UT inspection; safety-related pipe welding and NDE. This inspection involved 22 inspector-hours on-site by one NRC inspector.
Results:
No items of noncompliance or deviations were identified.
79012203o 6
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RII Rpt. Nos. 50-416/78-20 and 50-417/78-20 I-1 DETAILS I Prepared by:
EN
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$ 77 P. K. Van Doorn, Metallurgical Engineer
/Dat6 Engineering Support Section No. 2 Reactor Construction and Engineering Support Branch Dates of Inspection: November 28 - December 1, 1978
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Reviewed by: OYh 6~-whL
/7 5 7f T. E. Conlon, Chief
/Dat(
Engineering Support Sectiorr No. 2
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Reactor Construction and Engineering
Support Branch 1.
Persons Contacted a.
Mississippi Power and Light Company (MP&L)
- T. E. Reaves, QA Manager
- P. W. Sly, QA Field Supervisor
- D. L. Hunt, Assistant Maintenance Supervisor
- D. D. Little, QA Representative
- S. . Tanner, QA Representative b.
Contractor Organizations (1) Bechtel Power Corporation (Bechtel)
- R. L. Scott, Project QA Manager
- D. W. Strohman, QA Engineer 2.
Licensee Action on Previous Inspection Findings
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"1 Licensee action on previous inspection findings were not inspected during this inspection.
3.
Unresolved Items No unresolved items were identified during this inspection.
4.
Independent Inspection Effort (Unit I and 2) The inspector conducted a walk-through inspection a.
of the containment and auxiliary building to observe construc-tion progress and construction activities such as welding, material handling, housekeeping and storag.
RII Rpt. Nos. 50-416/78-20 and 50-417/78-20 I-2 b.
(Unit 1) The inspector observed reactor vessel internals installation activities being accomplished by GE (I and SE)
personnel. This work is being accompliahed in accordance with the ASME Boiler and Pressure Vessel Code, 1974 Edition, plus addenda through the Summer of 1976.
Specifically, the inspec-tor reviewed documentation related to liquid penetrant (LP)
indications found in existing internal clad weld adjacent to the in-core housing penetrations. This inspection was required as part of in-core housing welding being performed on-site.
The inspector also observed grinding activit,ies being performed to remove the indications. The inspector was informed that
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the indications were believed to be irrelevant and was caused by the weld bead being excessively rough making it hard to clean penetrant from between weld beads when using the GE hand-wipe, solvent removable LP method. The inspector was also informed that the indications did not appear during vessel manufacture because a pressurized water washable LP technique had been used by the vessel manufacturer. This technique was not feasible on-site.
Contour grinding of the weld beads had effectively removed the indications on those areas that had been ground and cladding thickness had not been violated in any area to date. The inspector also reviewed GE welding and LP procedures associated with in-core housing installation which were; General Welding Procedure, GG1GWP-01, Revision C; Inconel/ Stainless Steel Detailed Welding Procedure, ISE-Q-35, Revision 0; and Procedure for LP Examinations, PT-01-390, Revision A.
No items of noncompliance or deviations were identified.
5.
Preservice Inspection - Observation of Work and Work Activities (Unit 1)
MP&L has contracted with GE Installation and Service Engineering (I, and SE) Division to perform UT inspection of the reactor vessel. 1 Inspection is being performed in accordance with the ASW Cod'e,
Section XI, 1974 edition, plus addenda through the Summe of 1975 and the more restrictive and definitive requirements of the Winter 1975 and Summer 1976 addenda. The inspector observed calibration activities for inspection of seam weld AB and reviewed the procedure (no. 21A3814AA) for automated UT inspection of reactor vessel seam welds.
Calibration was not achieved during the time of the NRC inspection due to malfunction of an electrical cable.
Areas reviewed included reference point recording, marking of the reactor vessel, type of apparatus used, extent of coverage and scanning technique provided by the equipment, calibration methods, size and angles of search units, and the method used to record indication E.
RII Rpt. Nos. 50-416/78-20 and 50-417/78-20 I-3 No items of noncompliance or deviations were identified.
6.
Safety-Related Piping (Welding) - Observation of Work and Work Activities (Unit 1)
Safety-related pipe welding is being performed by Bechtel personnel in accordance with the ASME Code, 1974 edition, plus addenda through the Summer of 1974. The inspector observed three class 2 welds at various stages of completion to determine if requirements were being met. Weld No. 10 (18 inches by.438 inch) of ISO M-1348C was
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observed after root pass welding was completed and second pass
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welding was beginning, weld No. 99 (18 inch by.500 inch) of ISO M-1348E was observed during final welding and Weld No. 212 (12 inch by.375 inch penetration) of ISO FSK-E-422-E035 was observed during MT inspection of the final weld. The procedure utilized for MT inspection (MT-P-1, 2, Revision 1) was also reviewed. Areas reviewed included, as applicable, weld identification / location, evidence of QC verification, use of specified weld procedure, physical appearance of weld, welder identification and qualification, use of specified pre-heat nd interpass temperature, use of specified weld material, suitooility of weld surface for MT inspection and performance of proper NDE.
No items of noncompliance or deviations were identified.
7.
Exit Interview The inspector met with licensee representatives at the conclusion of the inspection and summarized the scope and findings of the inspection.
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