ML17348A869
| ML17348A869 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 02/05/1991 |
| From: | Goldber J FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| L-91-11, NUDOCS 9102120305 | |
| Download: ML17348A869 (5) | |
Text
ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
CESSION NBR:9102120305 DOC.DATE: 91/02/05 NOTARIZED:
NO DOCKET ACIL:50-251 Turkey Point Plant, Unit 4, Florida Power and Light C 05000251 AUTH.NAME AUTHOR AFFILIATION GOLDBER,J.H.
Florida Power 6 Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Advises that util will change cycling frequency for pressurizer spray valves from daily to weekly zn response to Inspector Followup Item 84-21-03 in Insp Rept (50....251/84=21.r DISTRIBUTION CODE:
IEOID COPIES RECEIVED:LTR t ENCL IP SIZE:
TITLE: General (50 Dkt)-Insp Rept/Notice of VioTation Response NOTES:
RECIPIENT ID CODE/NAME PD2-2 PD INTERNAL: AEOD AEOD/TPAB NRR MORISSEAU,D NRR/DLPQ/LPEB10 NRR/DREP/PEPB9D NRR/DST/DIR 8E2 NUDOCS-ABSTRACT OGC/HDS3 RGN2 FILE 01 XTERNAL: EG&G/BRYCE,J.H.
NSIC COPIES LTTR ENCL 1
1 1
1 1
1 1
RECIPIENT ID CODE/NAME AULUCK,R AEOD/DEIIB DEDRO NRR SHANKMAN,S NRR/DOEA/OEAB NRR/DRIS/DIR NRR/PMAS/ILRB12 OE D
EG FILE 2
NRC PDR COPIES LTTR ENCL NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE KVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
OTAL NUMBER OF COPIES REQUIRED:
LTTR 22 ENCL k
P.O. Box 14000, Sano Beach, FL 33408-0420 FPL FEBRUARY'Y S 1991 L-91-11 U. S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.
C.
20555 Gentlemen:
Re:
Turkey Point Units 3 and 4
Docket Nos.
50-250 and 50-251 Update on NRC Inspection Report 50-251/84-21, Inspector Follow-up Item 84-21-03 Automatic c clin of ressurizer s ra valves Florida Power
& Light Company (FPL) will change its cycling frequency for the pressurizer spray valves from daily to weekly beginning March 1, 1991.
The daily cycling was started in 1984 as a result of a verbal commitment made during NRC Inspection 50-251/84-21.
A description of circumstances that contributed to the initiation of this daily test and justification for changing the test periodicity from daily to weekly are described below.
In NRC Inspection Report No. 50-251/84-21, the NRC stated that FPL committed to "procedurally require automatic cycling of the spray valves once a
day by turning on the pressurizer heaters and allowing the valves to cycle."
This was-due to a failure of the valves to automatically, open (although they were manually opened).
The cause was determined to be valve sticking due to infrequent use.
The pressurizer spray valves PCV-455 A
B are now being tested. daily in accordance with Operating Procedure OP 0204.2, "Periodic Tests,
- Checks, And Operating Evolutions."
Since initiating this test in 1984, Turkey Point has experienced several failures of the valve bellows.
To reduce the probability of failure during power operation, the bellows have been routinely replaced during refueling outages.
Recent analysis of the spray valve failure history concluded that the bellows failures are exacerbated by daily cycling of the valves.
The valve/bellows replacements, and.additional personnel radiation exposure that occurs because of this activity, could be reduced by extending the cycling frequency.
Based on this, FPL believes it is appropriate to change the cycling frequency of the pressurizer spray valves to weekly beginning March 1, 1991.
After six months of weekly testing, another review will be performed to determine if the weekly testing program requires any further modification.
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U. S. Nuclear Regulatory Commission L-91-11 Page 2
A survey was performed of four other plants (of similar vintage and with similar valve design) which.revealed that none of them have regularly scheduled surveillance requirements to automatically cycle pressurizer spray valves.
Very truly yours, J.
H. Goldberg President Nuclear Division JHG/DRP/ds Enclosures cc:
Stewart D. Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant