L-82-472, Forwards Response to NRC Request Re Boron Dilution Sys Alarm,Per FSAR Question 440.28.Util Will Install Redundant Alarm to Alert Operators to Boron Dilution Transient
| ML17213A633 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 10/29/1982 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| L-82-472, NUDOCS 8211040415 | |
| Download: ML17213A633 (6) | |
Text
REGULATORY FOR TION DISTRIBUTION SY M
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ACCESSION NBR:8211040415 DUC ~ DATE: 82/10/29 NOTARIZED:
NO FACIL:50 389 St ~ Lucie Plant~
Unit 2< Florida Power 8 Light Cog AUTH~ NAME AUTHOR AFFILIATION UHRIG,R,E.
Florida Power 8 Light Co, RECIP, NAME RECIPIENT AFFILIATION EISENHUTgDgG.
Division of Licensing SUBJECT; Forwards response to NRC r equest re boron dilution sys alarmrper FSAR Question 440,28,Util will install redundant alarm to alert operators to boron dilution transient, DISTRIBUTION CODE!
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TITLE: Licensing Submittal:
PSAR/FSAR Amdts 8, Related Correspondence NOTES; DOCKET 05000389 RECIP IENT IO CODE/NAME A/D LICENSNG LIC BR N3 LA INTERNAL! ELO/HDS2 IE/DEP EPDS 35 NRR/OE/AEAB NRR/DE/EQB 13 NRR/DE/HGEB 30 NRR/OE/MTEB 1"1 NRR/DE/SAB 24 NRR/OHFS/HFEB40 NRR/OHFS/OLB 34 NRR/OSI/AEB 2O NRR/DSI/CPB 10 NRR/DSI/ETSB 12 NRR/PS I/PSB 19 NRR/DS RSB 23 EG F
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00, JUNO BEACH, FL 33408 Q l/g FLORIDAPOWER 8 LIGHT COMPANY October 29, 1982 L-82-472 Office of Nuclear Reactor Regulations Attention:
Hr. Darrell G. Eisenhut, Director Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear h/r. Eisenhut:
Re:
St. Lucie Unit No.
2 Docket No. 50-389 Boron Dilution S stem Alarm Attached please find Florida Power 8 Light Company's response to the NRC staff request on boron dilution system alarm for St. Lucie Unit 2.
The NRC original request was made in FSAR question 440.28.
Should you have any questions concerning this submittal please advise accordingly.
Very truly yours, Robert E. Uhrig Vice President Advanced Systems
& Technology REU/RJS/RWG/cab Attachment cc:
J.
P. O'Rei lly, Region II Harold F. Reis, Esquire 8211040415 821029'DR ADOCK 05000389, A
PDR..~
PEOPLE... SERVING PEOPLE
0 4 ~
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ATTAC%KNT NRC question 440.28 first requested information on St. Lucie Unit 2 boron dilution alarms.
Florida Power
& Light (FPL) response to question 440.28 provided all the indications and/or alarms available to alert operators that a boron dilution event is occurring.
In subsequent discussions between FPL staff and NRC reviewers, the NRC reviewers indicated that a redundant alarm is required.
To comply with NRC requests FPL will install a redundant boron dilution alarm to alert operators to a boron dilution transient.
Due to schedular demands on FPL staff during this stage of plant construction the alarm will not be completely functional until after our first planned refueling outage.
In the interim, FPL will increase its monitoring frequencies for boron dilution detection as prescribed on the table below:
Monitoring Frequencies for Backup Boron Dilution Detection For St. Lucie 2 0 erational Mode 8 of Charging Pumps 0
1 2
3 3
(Hot Standby) 12 hrs.
4 hrs.
2 hrs.
- (384 min) (142 min) 1 hr.
(128 min) 4 (Hot Shutdown) 12 hrs.
4 hrs.
2 hrs.
(427 min) (213 min) 1 hr.
(142 min) 5 (Cold Shutdown) 8 hrs.
1 hr.
0.5 hr.
(162 min) (81 min) 0.5 hr.
(54 min) 5 (Cold Shutdown with system drained down for repairs) 8 hrs.
0.5 hr.
(71 min)
Operation not allowed (35 min)
Operation not allowed (17 min) 6*
(Refueling) 24 hrs.
4 hrs.
2 hrs.
1 hr.
(668 min) (334 min)
(222 min)
>>During refueling the LPSX pumps should be used for makeup operations.
If it is necessary to use the charging
- pumps, the appropriate monitoring frequency above should be used.
>>>>The numbers in parenthesis included in the above table represent the number of minutes from initiation of dilution until Keff = 1.
These numbers do not appear in St. Lucie 2 Tech Specs.
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