ML20212E578
| ML20212E578 | |
| Person / Time | |
|---|---|
| Issue date: | 10/14/1998 |
| From: | William Ward NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | NRC |
| Shared Package | |
| ML20212E401 | List: |
| References | |
| NUDOCS 9909270042 | |
| Download: ML20212E578 (1) | |
Text
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[Tfsirifas'MshihTRiiidiation ; xposurJdUs to UT 6f VSC24Tsids
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From: WilliamV0ard y/nW
! To: TWFN_DO.twf5_po. TOM 2 7'AM
~ Date: Wed, Oct 14,1998 4:15 PM
Subject:
Radiation exposure due to UT of VSC-24 welds Mr. Martin, I am an inspector in the Spent Fuel Project Office. One of my duties has been to follow the inspections of the ultrasonic testing of VSC-24 casks at the Palisades, ANO and Point Beach nuclear plants. Mr. Wayne Hodges asked me if I could find out the estimated exposures due to UT'ing the casks.
As of yet, I have been unable to obtain Point Beach data. However, Palisades reported a total of 594 milli-manrem were received for 13 casks, or about 45 milli-manrem per cask.
ANO has now reported to me that they received an average of 10 milli-manrem per cask due to ultrasonic testing of the structurallid welds, it should be noted that Palisades' casks were dry inside and out, but out on the pad for several years.
ANO's casks were wet inside and out (they were still partially in the pool when the welding and UT were performed).
If Point Beach should report data to me, I would expect it to be the highest of the three. This is because they performed their UT with the cask out of the pool and due to some delays, after they had drained it to meet drain-down times. Although this is similar to Palisades, Palisades' fuel has been on the pad for several years after loading. I don't know the details of how long any of the plants fuel had been out of the reactor or what their burnup was.
V/R Bill Ward CC: MWH i