IR 05000295/1978021
| ML19273B147 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/04/1979 |
| From: | Danielson D, Yin I NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19273B144 | List: |
| References | |
| 50-295-78-21, NUDOCS 7902060403 | |
| Download: ML19273B147 (5) | |
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U.S. NUCLEAR REGULATORY COMMISSIO:,
OFFICE OF INSPECTICS AND ESFui: CEMENT REGIOS III
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Report No. 50-295/78-21 Docket No. 50-295 License No. DFR-39 Licensee: Commonwealth Edison Company P.
O.
Ecy 767 Chicago, IL 60690 Facility Name:
Zion Nuclear Power Station, Unit 1 Inspection AT:
Zion Site, Zion, IL Innspection Conducted:
September 21, October 3, 4, 6, 10, and 11, 1975
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Inspector:
1. T. Yin j
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U'
D. H. bniell son, Chief g[v[ f
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Approved By:
Engineering Support Section 2
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Inspection Summary Inspection on Sept _enber 21, October 3.
4, 6,
10, and 11, 1978 (Report No. 50-295/7o-21)
Areas Inspected:
Inspection of licensee surveillance and testings for safety related snubbers including:
(1) Control of hydraulic fluid, (2)
procedural provision for leak evaluation, (3) observation of testing, (4) condition of snubber installation, (5) review of desigr. documents, (6) personnel qualification, and (7) mechanical snubber tests.
The inspection involved 36 inspector-hours onsite by one NRC inspector.
Results No itenis of noncompliance or deviations were identified, r/902060'o3
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DLTAILS
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Persons Contacted
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Cerronwealth Fdison Company (CECO)
N. E. Wandke, Superintendent
- J. Leider, Assistant Superintendent
- L. G. Soth, Administrative Assistant
- J. Marianyi, Technical Staff Supervisor
- J. Koske, Assistant Technical Staff Super.'isor Assistant Technical Staff Supervisor R. Ungeran,
- J. K. Joosten, Primary System Engineer, Technical Staff C. K. Richardson, Engineer, Technical Staff F. H. Lahti, Engineer, Technical Staff H. Schneider, Thermal Group Engineer, Technical Staf f
- Denotes those attending the exit interview.
Functional or Program Areas Inspected 1.
General the licensee does not have a Technical Specification At present for surveillance and maintenance of the mechanical requirement have been taken to and hydraulic snubbers, however, measures check the condition of the snubbers during each refueling period.
I was estimated to The number of safety related snubbers in Unit be 543. During the July,1977, plant outage, in accordance with the record, 14 were found with small leaks, d were found with 151 or less percent fluid in the reservoir.
The number of safety r elated snubbers in Unit 2 was estimated to be 520.
During March,1978, refueling outage, 20 were found with small leaks,
11 were found to 16 were found with fluid level 15% or below, be inoperable.
The licensee stated that the procedures for inspecting the snubbers were in the process cf revision.
2.
Control of Snubber Hvdraulic Fluid The fluid used in ITT-Grinnell hydraulic snubbers is GE SF-ll54, silicone fluid.
During the inspection, fluid colors ranging frer clear, to light blue, to dark blue, to purple, to pink, and to red The control used for the fluid was in question.
were observed.
records, it was determined that During review of the procurement since September, 1973, the fluid was purchased as a "non safety related" and "non QA required" item.
As a result, no material-2-
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included in the procurement document, and no cor-specification was Further, it tificate of compliance was included with the delivery.
the dye used, which could have caused was uncertain whether or not colors seen, was compatible with the GE SF-1154 fluid, the various and the seal materials.
licensee stated that future snubF'r Subsequent to the inspection the fluid orders would be on a QA/QC purchase requisition, and "Certifi-cation of Conformance" requirements would be included with each licensee was also cormitted to obtain docurentation to The order.
established compatibility of the dyes with the snubbers.
This is an unresolved item (295/73-21-01).
Evaluation for the Small Leaks on Hydraulic Snubbers 3.
As mention in Pararraph I above small leaks on hydraulic snubbers were identified in both Units 1 and 2 during past licensee surveil-the inspector also observed small leak lances. During the visit, 112, and 117; FWRS 102, 103, and 106; BDRS-1028, on snubbers MSRS-106, and VC 48-S3.
In review of present program requirements, the small Icaks were neglected in that: (1) no leak locations were identified, and (3) there was (2) there was no determination of significance, for adjustment or repair.
The inspector stated that no requirement seal deterioration could create inoperability of the snubber even through the fluid had not completely leaked out.
This is an unresolved item (295/78-21-02).
4.
Hydraulic Snubber Functional Testin.
The inspector reviewed the procedure for functional testing of observed the demonstration by the site technical snubbers and staff.
It was determined that the acceptance lock up velocity and bleed rate did not take into consideration temperature the machine sensitivity and capacity could effects, and that not match the acceptance range specified in the test procedure.
The licensee stated tha: the procedure was in the process of being revised.
This is an unresolved item (295/78-21-03).
5.
Hydraulic Snubber Installation Deficiencies t
Snubber VC 48-S3 was wel ed to a leak chase structural channel The fluid which was not designed fc;r receiving seismic loading.
reserviore on snubbers DTIS 1067 and DTRS-1031 were mounted on the
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side of the cylinder.
The reservors should be installed on top of the cylinders as specified in the snubber manufacturer's installation instructions.
Subsequent to the inspection the licensee informed R111 that
VC 48-S3 had been relocated, and that the counting of reservoirs on DTRS 1067 and 1031 had been corrected.
The is an unresolved matter pending reinspection. (295/78-21-04)
6.
Design and Qual _ity Cont rol Documentation In view of the fact that VC 48-S3 was welded to a leak chase as described in Paragraph 5 above, the inspector questioned the design adequacy and documentation of the system.
Even though the 2-inch and smaller pipe systems and the attached snubbers and hangers were
" field-run," the Sargent and Lundy Engineers (S&L) design specifi-cation, " Supplement 60-3 to specification X-2242 (July 30,1968)
for pipe systems, dated February 9, 1973," requires installation to be documented.
Paragraph 5.F of the supplement 60-3 stated,
"All sesmic supports shall have an actual location on the piping within 12-inch of the location shown on the design drawings."
The CVC system design drawings, snubber details and QC inspection records were requested for review by the inspector but site per-sennel were unable to obtain these documents during the time of inspection.
Subsequently, the licensee stated that they will locate design information on snubber location and analysis fer those portions of CVC system requested.
This is an unrcsolved item (295/78-21-05).
7.
Review of Design Specification As stated in Paragraph 6 above, the inspector reviewed the supplement 60-3 t i Sam specification X-2242.
The specification provided guidance for seismic restraint maximum span requirements for various sizes of pipe but appeared to be lacking of consideration of pipe wall thickness and fluid or gas contents in the pipe system which could affect the dead weight of the system and change the seismic response and loading on the snubbers and restraints.
This is an unresolved item (295/78-21-06).
8.
Surface Rusting on Steam Generator Snubbers The inspector observed some rustings on steam generator B and D large hydraulic snubbers. Heavier rustings was observed on the piping-4-
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connecting the fluid reservoir to the cylinders.
1h" lic(nu
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cated that the rusting is not of immediate concern and corritteu
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correct the problen during next refueling outage.
The corrective action will include providing certified painters, approved procedures,
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and QA approved coating material.
This is an unresolved item (295/78-21-07).
9.
Personnel Training and Qualification The qualification of hydraulic snubber functional testing operators and the training records for the snubber maintenance personnel were not available during the inspection.
The licensee stated the test operator had been trained by ITT-Grinnell representatives based on the test prosedures, however, no records were maintained.
In regard to the training and indoctrination for the technicians, the licensee stated that the past policy had been to rely on craft supervisien judgment as to when a given individual is qualified to perform a safety related task.
This policy was changed about eight months ago and the present individual training records are being maintained.
This is an unresolved iten (295/78-21-08).
10.
Testing of Mechanical Snubbers Two mechanical snubbers 1RG146-FR1 and 147 SRI in the pressurizer area were tested by the inspector for freedon cf movement at low traveling speed and for lock-ups at sudden quick motions.
problem areas were identified during the tests.
Unresolved Matters Unresolved matters are matters about which more information is required in order to ascertain whether they are acceptable items, items of non-compliance or deviations. Unresolved items disclosed during this inspec-tion are discussed in Paragraphs 2, 3, 4, 5, 6, 7, S, and 9.
Exit Interview The inspector met with licensee representatives at the conclusion of the inspection on October 11, 1978.
The inspector summarized the scope and findings of the inspection.
The licensee acknowledged the findings reported herein.
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