ML19294C273
| ML19294C273 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 02/13/1980 |
| From: | Widner W GEORGIA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-26, NUDOCS 8003100019 | |
| Download: ML19294C273 (2) | |
Text
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February 13, 1980 Power Generation Department
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U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement
REFERENCE:
Region II - Suite 3100 RII: JPO 101 Marietta Street, NW 50-321/50-366 Atlanta, Georgia 30303 ISE Bulletin 79-26 Attention:
Mr. James P. O'Reilly Centlemen:
The following information is submitted in response to your letter of November 20, 1979, which transmitted I&E Bulletin 79-26, " Boron Loss from BWR Control Blades". The response provided is for Item 3 of the Bulletin as outlined in Item 5 of the Bulletin. Our letter of January 4, 1980, provided responses to Items 1 and 2 of the Bulletin.
RESPONSE
3.a On January 19, 1980 and January 28, 1980, Georgia Power Company performed control blade suberiticality tests on Hatch-1 and Hatch-2, respectively, while in cold xenon-free conditions.
The results of these tests indicate that full withdrawal of any control blade did not result in criticality for either unit.
3.b As a result of the most recent examination of control blade exposures, it has been determined that no control blade segment in either Hatch-1 or Hatch-2 currently exceeds 25 percent B10 average depletion (50 percent B10 local depletion).
Since the observations to date show that boron loss does not occur until 50 percent B10 local depletion, there is no impact by this phenomena on com-pliance with the shutdown margin requirement for either unit at this time.
If you have any questions or comments in this regard, please contact my office.
Very truly yours, L O <. $ ; a.-
a' c-e tt,( I t, 72 W. A. Widner Vice President and General Manager Nuclear Generation JAB /mb 8003100019
a Georgiis i)ower d U. S. Nucicar Regulatory Commission Office of Inspection and Enforcement Atlanta, Georgia 30303 February 13, 1980 Page Two xc: Director of the Office of Inspection and Enforcement Director of the Division of Operating Reactors, Office of Nuclear Reactor Regulation
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