IR 05000255/1979008
| ML18043A851 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/04/1979 |
| From: | Danielson D, Yin E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML18043A850 | List: |
| References | |
| 50-255-79-08, 50-255-79-8, NUDOCS 7907300071 | |
| Download: ML18043A851 (7) | |
Text
U.S.. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-255/79-08 Docket No. 50-255 License No. DPR-20 Licensee:
Consumers Power Company 212 West Michigan Avenue Jackson, MI 49201 Facility Name:
Palisades Nuclear Power Plant Inspection At:
Palisades Site, Covent, Michigan Combustion Engineering, Windsor, Connecticut Inspection Conducted:
May 14-15, and 22-23, 1979 at the site;
) 'J!WMay 16, 1979 at Combusti; ~;;;7g Office Inspector:
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Approved By:
D. H. Danielson, Chief Engineering Support Section 2 I
Inspection Summary Inspection on May 14-16, and 22-23, 1979 (Report No. 50-255/79-08 Areas Inspected:
Plant seismic modification including (1) review of calculation and pipe analysis, (2) review of installation and inspec-tion procedures, (3) review of QC records, and (4) observation of workmanship.* The inspection involved 26 inspector-hours onsite and at the Combustion Engineering office by one NRC inspecto Results:
No items of noncompliance or deviations were identified.
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DETAILS Persons Contacted Consumers Power Company (CPC)
- J. Lewis, Plant Superintendent
- K. W. Berry, Technical Superintendent
- G. S. Cashell, Licensing Analyst
- E. T. Wang, Generation Engineer
- G. Petitjean, Technical Engineer
- S. Fox, Senior QA Engineer
- B. Harshe, Senior Engineer Bechtel Power Corporation (BPC)
J. I. Dotson, Project Manager
- H. M. Vierrao, Construction Superintendent 7\\~D. s. Riat, Section Head, Piping and Stress
- K. Graves, Project Field Engineer R. Yonekawa, Project Field QC Engineer K. E. Osborne, Senior Engineer Combustion Engineering (CE)
'k--kW. D. Meinert, Project Manager
'k--kJ. E. Davison, Engineer, Project Office
- R. R. Mills, Licensing Supervisor
- R. Johnson, Analytical Engineer
- T. E. Natan, Engineer, Plant Structures
'k--kD. J. Ayres, Engineer, Plant Structures
- "'~C. C. Chiang, Engineer, Plant StructuFes USNRC
- R. D. Silver, NRC/DOR/ORB-2 Senior Project Manager
'k--kJ. R. Fair, NRC/EB/DOR Structural Mechanical Engineer
- Denotes those attending exit interview on Hay 23, 197 'k--kDenotes those attending pipe stress meeting at Combustion Engineering on May 16, 1979.
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Functional or Program kreas Inspected.
General In I969, Bechtel subcontracted to EDS to perform dynamic analyses on I4 of the large pipe system Later, in 1978, Bechtel noticed, while working on the steam generator repair project, that design inconsistencies existed between the system Since then, a complete review of all EDS work was performed and it was determined that a number of corrections were needed, including addition of four safety related snubbers to two of the four lines connecting safety injection tanks to the cold legs of the primary loop The scope of the RIII inspection included review of design documentation, observation of installa-tion, and review of QC inspection record Snubber Loads and Structural Design Review The safety injection lines involved are 12" CC4, from Safety Injection Tank #TS2D to Cold Leg Loop 2B (North Loop) and 12" CC4, from Safety Injection Tank #TS2B to Cold Leg Loop lB (South Loop).
The snubbers added to Loop 2B line are SS-12A and SS-IS The snubbers added to Loop IB line are SS-I4A and SS-IS Design Loading of the snubbers are:
Normal &
Faulted Thermal Snubber N Upset (lbs.)
(lbs.)
Mvt. (in.)
SS-12A 3,004 6,00S l"
SS-ISA l,S23 3,046 l"
SS-I4,102 6,204 I"
SS-ISA 2,22S 4,4SO I"
The inspector reviewed Bechtel structural calculation N S-4, "Pipe Support, Horizontal Restraints for CC-4-I2" Contain-ment Bldg. Hanger I2A, I4A, ISA and ISA," Rev. 0, issued on May 2, 1979, and approved on May I4, 1979, and had no adverse comment Areas reviewed included (I) deflection criteria, (2) stress levels, (3) weld design, and (4) formula selectio No items of noncompliance or deviation were been identified.
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- Pipe Stress Analysi.s Review The BPC report, "Review and Analysis of Piping Systems Affected by EDS Computer Program Error", dated May 12, 1979, was reviewed by the inspecto The analysis was performed in accordance with ANSI B31.l-1973, Power Piping Cod The inspector checked the maximum pipe stresses and compared them with the Code allowables as follows: Calculation No. PLS-11, dated May 6, 1979 "Tank 82B to Loop lB, "BC-1-12," A358, T304 Material (1) Press. +Wt. + OBE = 9,379 psi (18,720 psi allowed by Code)
(2)
Press. + Wt. + SSE = 14,068 psi (37,440 psi allowed by Code) PLS-11, GC-4-12", A376 T304 Material (1)
Press. +Wt. + OBE = 12,150 psi (14, 100 Code)
(2)
Press + Wt. SSE = 16,425 psi (28,200 Code)
Calculation No. PLS-12, dated May 6, 1979 "Tank 82D to Loop 2B", GC-1-12", A358 T304 Cl.1 Material (1)
Press. + Wt. + OBE = 14,527 psi (18, 720 Code)
(2)
Press + Wt. + SSE = 21,366 psi (37,440 Code)
PLS-12 cc-4-12" A376
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' T316 Material (1)
Press. + Wt. + OBE = 11,507 psi (13,440 Code)
(2)
Press. + Wt. + SSE = 15,973 psi (26,880 Code)
In regard to the stress levels at the connections of the primary loop cold legs, the BPC representatives stated that the forces and moments were transmitted to CE for approval and a response
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letter to a similar condition from CE to BPC, No. P-CE-4498,
"Tributary Nozzle Loads", dated December 6, 1978 was presente The inspector reviewed the letter and noted it where stated, in part, that "All stresses must be appropriate allowables required in the ASME Code Section III for the Class 1 nozzles and Section VIII for Class 3 nozzles.... "
The inspector further noted that (1) the BPC calculations and FSAR requirements are to be in accordance with ANSI B31.1, and questioned why CE gave allowables per ASME Section III definitions, and (2) BPC did not apply stress intensification factors per B31.1 requirement During a phone conversation, the CE engineers did not feel such a factor is applicable for the primary stres In order to resolve above areas, a meeting was held on May 16, 1979, at the CE office in Windsor, Connecticut, with representa-tives from NRR Project Management, NRR Mechanical Engineering, IE Region III, BPC, and the licensee presen During the meeting, all parties concurred that (1) the stress intensification at the joint between the run pipe and the branch pipe should be considered for both primary and secondary stresses, (2) the methodology established in ASME Section III to determine the stress in-tensity indices can be used due to the absence of applicable nozzle configuration provided in ANSI B31.lt and (3)
only the highest pipe stress areas were evaluated based on existing available information provided in the CE stress repor As a result of the simplified yet conservative calculation, it was determined that the stress level at the run pipe connection (with intensification factor included) was within the ASNI B31.1 Code allowabl No items of noncompliance or deviation were identified during the meeting.
Work Procedures and Drawing Review The procedures and drawings for installing safety related snubbers CC-4-12"-12A, CC-4-12 11-lSA, CC-4-12"-14A, and CC-4-12"-18A were reviewed by the inspecto The document reviewed included: Installation drawings and instructions including snubber size (all PSA-3's) and hot and cold position setting BPC Welding Procedure, No. Pl-ALH, "Shield Metal-Arc Welding of Carbon Steel Using Low Hydrogen Electrodes",
Rev. 2, dated October 25, 1978, and the Procedure Qualification Records, PQR-8, dated November 10, 1978.
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/ BPC NDE Proct;tiure, "Visual Examination Specificat~on, VT-ASME", Rev. 0, dated August 12, 197 No items of noncompliance or deviation were identified as a result of the revie.
Review of QC Inspection Records Snubber Installations Records reviewed included (1) in process QC inspection which consists of core drilling, initial installation, grouting, and adjustments, and (2) final QC inspectio Welding and NDE Records reviewed included (1) welder qualifications, (2)
NDE personnel qualifications, (3) initial fit-up inspection, (4) final weld configuration, and (5) visual examinatio Approval of Design Deviations Field Change Requests (1) No. M-8, dated May 10,*1979, approved May 11, 197 (2) No. M-18, dated May 16, 1979, approved May 17, 1979, (3) No. M-9, dated May 10, 1979, approved May 12, 1979, (4) No. M-19, dated May 16, 1979, approved May 17, 1979, (5) No. M-15, dated May 12, 1979, approved May 17, 1979, and (6) No. M-13, dated May 11, 1979, approved May 13, 197 Material Certifications (1) "Five-Star" grout with Devoider, non-shrink, non-metallic and (2) steel records by Standish Fabrication sho The Pacific Scientific Company mechanical snubber is fabricated from material qualified to ASME material specification No items of noncompliance or deviations were identified in the records reviewe.
Observation of Installation The inspector was unable to observe the final installation due to immediate plant startup, and he stated that the installations would be observated during the refueling outage in August 197 In the meantime, the inspector reviewed many photos taken at various angles and positions by the plant engineers, and had no adverse comment *
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No items of noncompliance or deviations were identified as a result of the observation Exit Interview The inspector met with site representatives (denoted in the Persons Contacted paragraph) at the conclusion of the inspection on May 23, 197 The inspector summarized the scope and findings of the inspec-tion noted in this repor