ML19247B067
| ML19247B067 | |
| Person / Time | |
|---|---|
| Site: | 07106698 |
| Issue date: | 05/18/1979 |
| From: | Mcneill W, Whitesell D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19247B066 | List: |
| References | |
| 71-6698-79-01, 71-6698-79-1, NUDOCS 7908070120 | |
| Download: ML19247B067 (8) | |
Text
.
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT REGION IV Report No. 71-6698/79-01 Docket No. 71-6698 Licensees: Nuclear Assurance Corporation Nuclear Fuel Services, Inc.
24 Executive Park West Attn: Mr. Larry Wiedermann Atlanta, Georgia 30529 Post Office Box 124 West Valley, New York 14171 Inspection at: Nuclear Fuel Services, West Valley, New York Inspection Conducted: April 19-20,1979 Inspectors :
[, /[
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/S [79 W. 'M. McNei'll, Contractor Inspector, Date
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Vendor Inspection Branch
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EE N
Approved by:
D. E. Whitesell, Chief, CcmponentsSection I, Date Vendor Inspection Branch Summa ry Special Inspection on Aoril 19-20, 1979 (71-6698/79-01)
Areas Inspected: A special inspection of the spent fuel casks dimensional exam: nation was performed as a result of the order to suspend the use of casks under Certificate of Compliance No. 6698.
The inspection involved 12 inspector-hours on site by one NRC inspector.
Results: No items of noncompliance or deviations were identified.
425 192 7908070 Q Q
, Details Section A.
Persons Contacted 1.
Nuclear Assurance Corporation (NAC)
- R.
C. Bonnett, Field Service Technician
- J. C. Dembo, Cask Design Engineer H. R. Panter, Cask Design Engineer
- J. M. Viebrock, Manager On-site Operation 2.
Nuclear Fuel Services (NFS)
W. A. Oldham, General Manager
- l. E. Seitter, QA Engineer W. Wiedermann, Shipping and Storage Engineer
- oe
' those present at the exit interview.
B.
Dimensional Examination 1.
Background Information An order was issued on April 6,1979, which prohibits the use of model numbers NFS-4 anc NAC-1 spent fuel shipping casks.
Seven (7) of these casks current'y exist, one of which has not completed fabrication.
The order required licensees to make actual physical measurements of existing packages (i.e. cask inner shell's bow or straightness and evality or circularity) in order to demonstrate that the casks are in accordance with the Certificate of Compliance Number 6698.
Certificate of Compli-ance Number 6698 references drawing E10080 which specifies straightness of 0.130 of an inch for the inner shell.
The Cer-tificate also references QA plans which reference '4SME Code, Class 2, which specifies an ovality tolerance of 0.135 of an inch for the inner shell.
NAC designed and procured a special cask cavity measuring tool.
This tool consisted of four major parts, A center shaft, two (2) three-legged positioning spiders (top and bottom) and one traveling spider with six (6) dial indicators at 600 positions.
The traveling spider
's icwered in six (6) inch increments the full length of the
.s k.
Readings were taken by one operator and checked by a secon..perator.
The icwer levels were read with the aid of binoculars.
After all readings were taken, several random location readings were repeatec.
NAC documented this activity with a written procedure which also described the calibration of the tool.
There were four (4) casks present, NFS-1A, NFS-1B, NAC-4C and NAC-4D.
NAC-4E was measured at the fabricators shop, Excelco.
NAC-4A and NAC-4B were at the Duke Pnwer Oconee site.
425 193 2.
Objecti ves The objectives were to verify that the dimensional inspection performed by NAC gave assurance the spent fuel casks meet the certificates.
The objectives also include verifying that the measurement system was accurate, valid and reliable.
3.
Method of Accomolishment The measurement process of all casks was cbserved by the inspec-tor.
This observation included:
a.
Verification that the gages and tools were calibrated, b. Checking the measurement tool after set up in the cask for excessive ' lay and proper set up; c.
Surveillance of the measurement activities for compliance to the documented procedure; d.
Repeating random measurements during the measurement process; and e.
Review of the data collected.
4.
Findings The gages and cask cavity measuring tool was found to have been calibrated currently.
The set up was found to have very little play e.g. +.00005.
The NAC personnei con. plied with t' docu-mented procedure.
The measurements repeated by the im ctor were in close agreement with NAC measurements.
In gene.-al, the measurement system was observed to be very accurate e.g. +.0004.
Some operator errors were observed.
These errors were of random magnitude and were the result of reading dials through binoculars, background noise, and other various sources. The cperator errors were not found at a significant frequency for the work environ-ment.
The raw data (See attached) indicated that some of the casks had a bow of about 0.170 to 0.180 of an inch, and others an ovality of about 0.170 to 0.180 cf an inch.
The raw data is to be reduced and fitted to "a line of best fit" and then submitt_d to NRC Trar.aportation Branch for evaluation.
NAC will have to perform an engineering evalua-tion of the bcw and ovality conditions.
C.
Exit Interview The inspector met with licensee representatives (denoted in paragraph A) at the conclusion of the inspection on April 20, 1979.
The inspector summarized the results of the inspection.
The licensee representatives had no comment in response to each item discussed by the insoector, h
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