IR 05000293/1981034
| ML20039B656 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 11/25/1981 |
| From: | Chaudhary S, Lester Tripp NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20039B653 | List: |
| References | |
| 50-293-81-34, NUDOCS 8112230351 | |
| Download: ML20039B656 (4) | |
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U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT Region I Report No.
50-293/81-34 Docket No.
50-293 t
License No. -DPR-35 Priority
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Category C
Licensee:
Boston Edison Company 800 Boylston Street Boston,!!A 02199
Facility Name:
Pilgrim Nuclear Power Station, Unit 1
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Inspection at:
Plymouth, MA
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Inspection conducted: November 3 - 6, 1981 Inspectors:
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S. Chaudhary, Redctor Inspector dhte' signed I
date signed
date signed
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Approved by: C/.
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date signed W
L.E. Trippi ~Chiet, Material and Processes Section, EIB Inspection Summary:
Inspection Report No. 50-293/81-34
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Area: A routine unannounced. inspection by a regional based inspector of the licensee activities in the area of pipe support / restraints surveillance and functional operability. The inspection involved 27 hours3.125e-4 days <br />0.0075 hours <br />4.464286e-5 weeks <br />1.02735e-5 months <br /> on-site by one regional based inspector.
Results: No items of noncompliance were identified.
i 8112230351 811203
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PDR ADOCK 05000293
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G PDR i
Region I Form 12
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(Rev. April 77)
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DETAILS 1.
Persons Contacted BECO
- P. Giardiello, Senior Compliance Engineer R.D. Machon, Station Manager
- C. Mathis, Deputy Nuclear Operations Manager
- K. Roberts, Chief Maintenance D:9 neer
In addition to the above, several persons from the plant maintenance depcrtment were also contacted during the course of the inspection.
US-NRC
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- J.R. Johnson, Senior Resident Inspector H. Eichenholtz, Resident Inspector
- denotes persons present at exit interview 2.
Licensee Surveillance of Pipe Support and Restraint System a.
Review of Procedures The inspector reviewed the documentation and held discussions with cognizant licensee personnel regarding the surveillance program of hydraulic and mechanical shock st? pressors, and other pine supports.
The following documents were reviewed:
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ONPS Procedure: 3.M.4-28, Rev. 8, " Inspection of Hydraulic Shock Suppressors (Snubbers) Mechanical Shock Arrestors, Pipe Hangers and Restraints."
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PNPS Procedure: 3.M.4-37, Rev. 6, " Disassembly, Maintenance and Reassembly of Hydraulic Snubbers."
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PNPS Procedure: 3.M.4-43, Rev. 4, " Surveillance Functional Testing of Hydraulic Shock Suppressors."
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Technical Specification. Sections 3.6.I, and 4.6.I, and Table 3.6.I.
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Technical Specification Revision Request, dated October 15, 1981:
Sections 3.6.I and 4.6.I Tables 3.6.I(a) and 3.6.I(b)
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Snubber surveillance data sheets, dated 3/26/79 Snubber surveillance data sheets, dated 1/11/80.
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However, the inspector No items of nonccmpliance were identified.
noted that, in the applicable procedures, there was tio definite criterion
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to determine the operating status of a bydraulic snubber when the accumulator indicated an extreme extended position and/ or empty.
See paragraph 2.b below. This lack of criterion is considered Part of Unresolved Item 81-34-01.
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Visual Surveillance Data The inspector re, ewed the visual surveillance data sheets for the following pipe supports and restraints:
Hydra 9 1c Snubbers:
SS-1-10, SS-1-10-1, SS-1-10-3, SS-6-10-7, SS-6-10-8, SS-10-30-1, SS-10-20-2, SS-10-20-3, SS-10-20-8
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Maintenance Summary and Control Sheet, dated 10/23/81 for Hydraulic Snubbers, MR Log No. 81-55-12.
The data for the above pipe support and restraints were reviewed to verify the following:
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There was no visible sign of deterioration and/or corrosicc
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There was not physical damage or deformation to render the support or restraint inoperable.
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The support or restraints were not in " frozen" or " locked-up" position.
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Bleed holes were open and free, if applicable.
The inspector observed that out of seventy five snubbers inspected in October of 1981, thirteen snubbers appeared to have failed to meet the visual acceptance criteria.
The licensee is evaluating the effect of such a failure rate on the scheduling of the next surveillance of supports and restraints. The plant technical specification requ!res a shortening of scheduled surveillance and inspection interval to a cycle of thirty one days if the number of unacceptable snubbers in any one inspection cycle is eight or more for any one group of snubbers.
The inspector also noted that the surveillance reports for hydraulic snubbers for March, 1979 and November, 1980 also contained many examples of snubber accumulators indicating apparently empty reservoirs, however, bench test data for snubbar operability were not readily available to determine the functional operability of snubbers in service.
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the plant Technical Specification required that the frequency of surveillance / inspection be based on number of snubber failures, the inspector was unable to establish the validity of surveillance frequency.
This item remains unresolved and will be followed-up in subsequent inspections. (50-293/81-34-01)
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Visual Inspection of Masonry Walls, and General Walk-through Inspection The inspector conducted a general walk-through inspection of the plant to visually inspect accessible pipe supports, snubbers, and restraints to assess the general condition of maintenance, tagging, and up-keep of safety related items.
The inspector also visually inspected masonry walls which have been reported by the licensee as to not meeting the acceptance criteria established pursuant to It3:80-11. However, the licensee's submittals to NRC in responsa to the bulletin have not been fully reviewed by NRC, therefore, the bulletin remains open pending the review and subsequent inspection of the completed work. The senior resident inspector accompanied the inspector on this inspection.
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Unrs;olved Items Unresolved items are matters about which more information is required in order to ascertain whether they are acceptable items, items of noncompliance or deviations. Unresolved items are contained in paragraph 2.b of this report.
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Extt Interview The inspector met with licensee representatives (denoted * in paragraph 1)
at the conclusion of the inspection on November 6, 1980. The inspector summarized the purpose, scope and findings of the inspection.