ML19262C153
| ML19262C153 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 01/02/1980 |
| From: | Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-79-26, NUDOCS 8002070024 | |
| Download: ML19262C153 (2) | |
Text
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4 POWER AUTHORITY OF THE STATE OF NEW YORK
. JAMES A. FITzPATRfCK NUCLEAR power PLANT 8
JOHN D. LEONARD, JR.
P.O. 80x 41 Resdent Manager Lycoming, Nevv York 13093 315 342 3840 January 2, 1980 JAFP-80-005 SERIAL:
e Mr. Boyce H. Grier, Director United States Nuclear R;gulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406
SUBJECT:
NRC BULLETIN 79 BORON LOSS FROM BWR CONTROL BLADES
Dear Mr. Grier:
The FitzPatrick plant staff has completed its review of the subject bulletin and the results of this review are presented belcw in the same order as Indicated in the bulletin:
1)
The FitzPatrick plant process computer tracks cumulative control rod segment exposure for all control rods.
Each of the four segments is a three (3) foot section of the control rod blade.
This data is routinely collected and reviewed on a monthly basis.
2)
A review of the FitzPatrick plant operating history indicates that none of the control rod blades are predicted to have greater than 34% boron-10 depletion averaged over the upper one quarter of the blade at the end of the next operating cycle.
The re fo re, the Fitz-Patrick 71 ant does not plan to replace any control rod blades during the next refueling outage.
3)
The FitzPatrick plant will conduct a shutdown margin demonstration as part of the post refueling startup test program following the next re fue l i ng.
We do not currently ant *cipate that we will achieve a cold shutdown condi tion prior to shutdown for the 1980 refueling.
However, i f such a shutdown should occur and result in a cold xenon-free condition, (a shutdown period of greater than ninty-six (96) hours) the plant will conduct and record as a matter of current practice, a cold, xenon-free critical control rod pattern as a part of the subsequent plant startup.
This data will provide sufficient Information to confirm adequate shutdown margin.
In addition, if any control rod blade segment is projected to exceed "end of 1i fe",
the plant will apply, based on *.ne blade manufacturers recommendations, 1926 057
Eioyce H. Grier, Di rector January 2,1980 United States Nuclear Regulatroy Commission JAFP-80-005
SUBJECT:
NRC BULLETIN 79-26 Page 3) conservatism to the shutdown margin requirements thus ensuring an acceptable shutdown margin.
4)
The FitzPatrick plant has requested that the NSSS vendor initiate a program involving other licensees for destructive examination of highly exposed control rod blades in order to provide the data and evaluation requested on a generic basis. When this examination and evaluation of the data has been completed we will p.rovide the required response as req ues ted.
Very.truly yours u
4/
%khqC. *
- y. -
JDL:VC:Jjh J,ohn D. I.ec'na r'd," J r. ~
CC:
G. T. Berry, PASNY-NYO Res ident Manager G. A. Wilverding, PASNY-NY0 P. W. Lyon, PASNY-NYO J. F. Davis, PASNY-NYO
/
M.
C. Cosgrove, PASHY-JAF R. J. Pasternak, PASNY-JAF C. S. Orogvany, PASNY-JAF Document Control Center U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement Division of Reactor' Operations inspection
'lashington, D. C. 20555 1926 058