L-96-268, Forwards Response to NRC Bulletin 96-001, CR Insertion Problems
| ML17354A316 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 10/23/1996 |
| From: | Hovey R FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-96-001, IEB-96-1, L-96-268, NUDOCS 9611010078 | |
| Download: ML17354A316 (8) | |
Text
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ACCESSION NBR:9611010078 DOC.DATE: 96/10/23 NOTARIZED: NO DOCKET FACIL:50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 AUTH.NAME AUTHOR AFFILIATION HOVEY,R.J.
Florida Power a Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards response to NRC Bulleting 96-01, "CR Insertion Problems."
DISTRIBUTION CODE:
IE57D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: NRC Bulletin 96-01 Control Rod Insertion Problems NOTES:
RECIPIENT ID CODE/NAME NRR/DRPW/PD4-2 CROTEAU,R COPIES LTTR ENCL 1
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1 RECIPIENT ID CODE/NAME PD2-3 PD COPIES LTTR ENCL 1
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INTERNAL: AEOD NRR/DRPM/PECB NRR/THOMAS,K EXTERNAL: NOAC 1
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1 SNPB NRR/DSSA/SRXB RES NRC PDR 1
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LTTR ll ENCL
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OCT23 1996'-96-268 10 CFR 550.54(f)
U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555 Re:
Turkey Point Unit 3 Docket No. 50-250 NRC Bulletin 96-01 (TAC NO. M95012)
NRC Bulletin 96-01, "CONTROL ROD INSERTION PROBLEMS", issued March 8,
- 1996, requested licensees take specific actions and provide information to the NRC.
In accordance with NRC Bulletin 96-01, Florida Power and Light Company provides the attached response relative to the Turkey Point Plant Unit 3 Cycle 15 Mid-Cycle Outage.
Should there be, any questions, please contact us.
Very truly yours, R. J.
Hovey Vice President Turkey Point Plant JAH Attachment cc:
S, D. Ebneter, Regional Administrator, Region II, USNRC T. P.
- Johnson, Senior Resident Inspector,
A g i
Attachment Page 1 of 1 L-96-268 On March 8, 1996, the NRC issued Bulletin 96-01, CONTROL ROD INSERTION PROBLEMS. This bulletin was intended to alert licensees to problems encountered at South Texas and WolfCreek, during which control rods failed to completely insert upon a scram signal.
The bulletin requested licensees to perform four actions to ensure that the required shutdown margin is maintained during a reactor trip. Action (3) ofBulletin 96-01 requested licensees to measure and evaluate at each outage ofsufficient duration during calendar year 1996 (end ofcycle, maintenance, etc.), the control rod drop times and rod recoil data for all control rods.
'Ihe bulletin requires that within 30 days after completing Requested Action (3) for each outage, a report that summarizes the data and documents the results obtained be submitted to the NRC.
On September 24, 1996, a manual shutdown ofTurkey Point Unit 3 was performed as a result oftwo control rods (F-12 and K-4 in Control Bank C), dropping into the core. The cause ofthe dropped rods was a control circuit failure. Both affected Rod Cluster Control Assemblies fullyinserted with no observable binding. During the subsequent manual shutdown via rod stepping into the core, all rod bottom lights energized as expected at approximately 20 steps withdrawn and all control rods fullyinserted as expected.
Cycle burnup at the time of the shutdown was 10,055 MWD/MTU.
FPL determined that the rod drop testing requested per Action (3) ofNRC Bulletin 96-01 would not significantly impact the Unit 3 outage critical path and therefore was of "sufficient duration" to perform control rod drop time testing and obtain rod recoil data.
On September 26, 1996 Hot Rod Drop Timing Tests were completed on Unit 3. Turkey Point Units 3 and 4 Technical Specification 3.1.3.4 requires that the individual fulllength (shutdown and control) rod drop times be less than or equal to 2.4 seconds. AllRCCAs demonstrated acceptable control rod drop times.
In addition to the drop times, FPL reviewed the rod recoil data for all of the control rods. All45 RCCAs indicated some recoil.
In conclusion, the results ofthe Unit 3 Mid-Cycle 15 Hot Rod Drop Test revealed no indications ofthe control rod anomalies described in NRC Bulletin 96-01 CONTROL ROD INSERTION PROBLEMS. All Unit 3 RCCAs demonstrated acceptable performance and continue to be operable.
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L-96-268 STATE OF FLORIDA COUNTY OF DADE
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being first duly sworn, deposes and says:
That he is
- Company, the Licensee herein; of Florida Power and Light That he has executed the foregoing document; that the statements made in this document are true and correct to the best of his knowledge, information and belief, and that he is authorized to execute the document on behalf of said Licensee.
1.
R. J.
Hovey Subscribed and sworn to before me this day of 1996.
Name of Notary Public (Type or Print)
NOTARY PUBLIC, in and for the County of
- Dade, State of Florida
,:"~RTQ, GHERYLILSTEVEMSOH i;::i=
MYCOMMISSICM0CCSW7
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EXPIRES: dune 19, 2XO 4@I4" Bonded 7hu HotlyPicOr~
My Commission expires Commission No.
R. J.
Hovey is personally known to me.
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