IR 05000416/1978012
| ML19248C488 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 08/28/1978 |
| From: | Conlon T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| 50-416-78-12, 50-417-78-12, NUDOCS 7810020171 | |
| Download: ML19248C488 (5) | |
Text
>R "f Cg UNITED sT ATEs o,
NUCLEAR REGULATORY COMMISSION
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o REGION 11
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101 M ARIE T T A sT H E E T, N.W.
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'leport Nos. -
50-416/78-12 and 50-417/78-12 x-ket Nos.:
so-416 and 50-41'
License Ncs.:
CPPR-118 and CPPR-119 Categories: A2 and A2 Licensee:
Mississippi Power and Light Company P. O. Box 1640 Jackson, Mississippi 39205 t
Facility Name:
Grand Gulf Nuclear Station, Units 1 and 2
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l Inspection at:
Grand Gulf, Misrirsippi Inspection conducted:
July 18-21, 1978 I
Inspector:
J. Blake
Accompanying Personnel:
E. H. Girard fkf Reviewed i &
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. Conlon, Chief Da(e Engineering Support Section No. 2 Reactor Construction and Engineering Support Branch Inspection Summary Inspection on July _ 18-21, 1978 (Report Nos. 50-416/78-12 and 50-417/78-12)
Areas Inspected: Routine unannounced inspection of reactor coolant pressure boundary and safety-related,iping welding (Unit 1); containment restoration (Unit 1); reactor vessel internals (Unit 1); licensee action on previous inspection findings.
This inspection involved 23 inspector-hours on site by one h7C inspector.
Results:
There were no items.f noncompliance or deviations disclosed.
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RII Rpt. Nos. 50-416/78-12 1-1 and 50-417/78-12 f[0de DETAILS I Prepared by:_
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/ Blake, Metallurgical Engineer Date (neering Support Section No. 2 eattor Construction and Enginecring Support Branch Dates of Inspection: July 18-21, 19 8 Reviewed L k?d y
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T. E. Conlon, Chief Da e Engineering Support Section No. 2 Reactor Construction and Engineering
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Support Branch l
1.
Persons Contacted a.
Mississippi Power and Light Company (MPL)
- P. W. Sly, QA Field Superviscr
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- D. D. Little, QA Representative
- J. C. Fuller, QA Representative b.
Contractor Organization Bechtel Power Corporation
- D. W. Stroham, QA Engineer
- M. K. Robinson, Assistant Project Field QC Engineer
- Indicates those participating in the exit interview.
The inspector also talked with and interviewed several other licensee and contractor personnel during the inspection.
2.
Licensee Action on Previous Inspection Findings (Open) Unresolved Item (416/78-02-01) Vendor Radiographs - Bechtel has completed the review of this problem and has submitted a final report to MP&L. MP&L had not completed the review and evaluation of this report at the time of this inspection.
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RII Rpt. Nos. 50-416/78-12 I-2
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and 50-417/78-12 3.
Unresolved Items Unresolved itens are matters about which more informaticn is required in order to ascertain whether they are acceptable items, items of noncompliance, or deviations. An unresolved item disclosed during the inspection ir, discussed in Paragraph 6.
4.
Independent Inspection Effort The inspector observed work activities in the following areas:
A.
Safety-Related Piping F netrations (Unit 1)
l Tha inspector observed the magnetic particle inspection of the guard pipe to penetration sleeve welds in the steam tunnel.
B.
Reactor Vessel Intermals (Unit 1)
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The inspector observed operations involved with the trial fit-up of the core shroud.
C.
Containment Liner Restoration (Unit 1)
The inspector observed that the storm damaged sections of the contairment liner had been replaced. The replacement pieces were tack welded into place and installation welding was in process.
D.
Haulage Road Test (Unit 2)
The inspector observed the testing of the Haulage Road in preparation for the receipt of the Unit 2 reactor vessel. The road was tested by the reactor vessel crawler carrying a concrete test load.
There were no items of noncompliance or deviations in this area of the inspection.
5.
Reactor Coolant Pressure Boundary Piping (Welding I) - Observation of Work and Work Activities (Unit 1)
The inspector observed work activities on two weld joints in the S observed was as follows:
recirculation system. Vor (
Veld 10, (24" dia X 1.2" vall stainless steel piping) - The weld was observed on 7/18/78 with the root pass welding complete and the welders visually inspecting the internal root veld configuration. On
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7/19/78 the welders were observed welding above the root layer.
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RII Rpt. Nos. 50-416/78-12 1-3
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and 50-417/78-12
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Weld 33, (24" dia X 1.2 vall stainless steel piping) - This weid was welved to completion and was in process of being ground for final inspection.
There were no items of noncompliance or deviations in this area of inspection.
6.
Safety-Related Piping (Welding) - Observation of Work and Work Activities (Unit 1)
The inspector observed the following work activities during this part l
of the inspection.
RRR System, ISO M1349A, Weld 10. - Contour grinding of pipe to valve veld prior to final inspection.
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RHR Syctem, ISO M1348A, Weld 30 - Welding above root in process.
RER System, ISO M1348A, Weld 29 - Welding complete ready for contour
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grinding.
The inspector observed work activities for compliance to welding procedure requirements; reviewed weld history documentation for the work completed; and inspected the deposited weld for workmanship.
There were no r.oncompliances or deviations in this area of the inspection.
There was one question raised during the observation of the contour grinding of weld 10 and the inspection of weld 29. This question involved the ASME code requirement that the transition between items of different diameters have a einimum slope of 3 to 1.
(This requirement is listed in paragraphs NB4425, N O '25, and ND4425 of the ASME B&PV Code.)
In discussions with the workers involved with the
' ding and grinding operations. The inspector was told that welds betu valves and piping were normally ground to provide a smooth transition. Subsequent discussions with MP&L and Bechtel QA personnel and review of procedurer, did not show any requirement for welding or visual inspectors to incpect for the required slope on a transition between two diameters such as a heavy wall vilve and a pipe.
The inspector informed the licensee that the inspection and documen-(
tation of these transitions would be carried as ur. resolved item No.
416, 417/78-12-01.
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RII Rpt. Nos 50-416/78-12 I-4
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and 50-417/78-12
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7.
Exit Interview The inspector met with licensee and contractor representatives (denoted in paragraph 1) at the conclusion of the inspection on July 21, 1978.
The inspector summarized the scope and findings of the inspection.
The licensee and contractor agreed to review the welding inspection procedures and take whatever action is necessary to ensure that all of the required inspections are being conducted.
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