L-80-229, Responds to Requesting Info on Auxiliary Feedwater Sys.Attachment 2 Provides Addl Info to Suppl 791220 Response
| ML17339B219 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 07/22/1980 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| L-80-229, NUDOCS 8007280562 | |
| Download: ML17339B219 (8) | |
Text
REGULATORY,<FORMATION DISTRI'BUTION S.
cM (RIDS)
ACCESS'ION NBR 8007280562 DOC ~ DATE 80/07/22 NOTARIZED NO FACIL:50-250 Turkey Point P'1'anti Vni t 3E Florida Power and Light C
50-251 Turkey Point Pl ant E Unit QE Florida Power and Light C
AUTHRNAME AUTHOR AFFILIATION UHRIGR R ~ E ~.
Florida Power 8 Light Co.
RECIP ~ NAME RECIPIENT AFFILIATION VARGAES ~ AD Opera. ting Reactors Branch 1
DOCKET 05000250 05000251
SUBJECT:
Responds to 800530 1 tr requesting info on auxi1 iar y feedwater sys,Attachment 2 provides addi info to suppl 791220 r esponse
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TITLE: Genera1 Distr ibution for after Issuance of Opeiating Lic NOTES0 REC IP IENT 1D CODE/NAME ACTION:
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.O. BOX 529100, MIAMI,F L 33152
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FLORIDA POWER & LIGHT'COMPANY July 22, 1980 L-80-229 Office of Nuclear Reactor Regulation Attent'ion:
Mr. Steven.A.
Varga, Chief Operating Reactors Branch 81 Division of Licensing U. S. Nuclear.Regulatory Commission Washington, D;C.
20555
Dear Mr. Varga:
Re:
Turkey Point Units 3
& 4 Docket Nos.
50-250 8 50-251 Auxiliar feedwater S stem The attached information is submitted in response to your letter of May 30, 1980.
Attachment 1 contains information that specifically addresses the open items discussed in your letter.
Attachment 2 provides additional informati'on to supplement,out
.previous. response dated December.
20, 1979 (L-79-354).
Very truly yours, Robert E, Uhrig-Vice President.
Advanced Systems 8 Technology REU/MAS/pa Attachments (2) cc:
J.
P. O'Reilly, Region II Harold F, Reis, Esquire pX 8oOVBS0 PEOPLE... SERVING PEOPLE
ATTACHMENT l.
Re:
Turkey Point Units 3 5 4 Docket Nos. 50-250 5 50-251 Auxiliar Feedwater S stem Generic Short-Term Recommendation 4
GS-4 In their May 30, 1980 letter, the NRC staff suggests that Florida Power 8
Light Company (FPL) revise the Turkey Point Technical Specifications associated with Condensate Storage Tank (CST) level to make them more consi-stent with the Westinghouse Standard Technical Specifications (STS).
In general, we find conversion to the STS a difficult task because Turkey Point Units 3 8 4 were designed and constructed wel'1 before the STS were oficially promulgated, and the organization of the existing Technica'1 Specifications is differen't from'.,< the.,STS.
For the specific.case in question, Technical Specification 3.8.3 requires that a reactor be shutdown and cooled down if CST volume remains below a specified limit for longer than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
Under realistic operating conditions, there should be adequate CST water avajlab]e during the 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> grace period to provide adequate protection for the Auxiliary Feedwater (AFW) pumps, The AFH pumps can take suction from ei.ther of two CST's through non-return check yalyes that automatically direct flow to the pumps from the highest CST.
Therefore, even if one CST was below the minimum specified volume, the second CST would be available to supply the AFW pumps.
For cases where one CST is low, or both CST's are low, Operating Procedure 7300.3 has been written to guide the operators in providing make-up water from the condenser hotwell, the Primary Water Storage Tanks (PWSTs), or the fire main system.
(The fire main system would only be used in an emergency.)
In
- addition, a 500,000 gallon. deaerated water storage tank is bei.ng constructed that will be avai-lable to supply, among other things, the CST'.s and the AFW pumps.
Furthermore, with appropriate operator action, fossil Units 1
and 2 can also be used to supply feedwater to the Units 3 5 4 steam generators.
- Although multiple sources of CST make-up and AFW'ump supply.(as described above}, combined'with instructions to licensed operators to maintain acceptable CST levels or take appropriate action, provide sufficient control to ensure an adequate supply of condensate, we have determined that an additional Technical Specification, requiring more immediate corrective action at some CST volume below what,is now specificed, would be appropriate.
We are in the process of writing such a specification and plan to have a draft by August 15, 1980 to forward to our on-site and off-site safety review coranittees.
The revisions generally take about 30 days, therefore, we have established September 30, 1980 as the anticipated submi,ttal date.
ADDITIONAL SHORT-TERM:RECOMMENDATION 2'he AFN pump endurance
.test was performed'n June 20, 1980.
A'opy of the completed test;procedure,wj;l~l.
be forwarded under separate cover.
GENERIC LONG-TERN RECOMMENDATION 3 (GL-3 A modification to the steam supply valves is planned.
Two of the three valves will be converted to DC power.
A January 1,
1981 implementation date is scheduled,
- however, the DC operators wi"ll be instal.led as soon as practical pending. material avai,labil-ity and unit outage time.
ATTACHMENT 2 Re:
Turkey Point Units 3 5 4 Docket Nos.
50-250 5 50-251 Auxi.l'iar Feedwater Pum s
Generic Short-Term Recommendation 5 (GS-5 During certain test evolutions, an operator is stationed at the AFW pumps.
In order to el'iminate the need for a local operator, an electrical modification is planned by January 1,
1981 (pending material availability) to allow AFW pump, start signals to override test situations.
More specifically, an operator will be able to "switch out".t>io.. AFW pumps (bypass
%he contro'1 circui.try) so that the third pump can be tested,
- however, an override capability will exist to ensure that AFW flow is available automatically in case of an AFW pump start signal.
The decision to pursue this modification has also eliminated the need for DC lighting at the local AFW pump station and for a sound powered phone link between the local station and the Control Room.
In addition, a modification is planned to provide lube ojl cooling flow f'rom the discharge of the AFW pumps.
Thjs modification, combined with: the conyersjon of two steam supply valves to DC power, e]iminates the need fop a ]oca'j operator on loss of AC power.
In the interim, procedures have been in.place since Mal ch 3], ]980 to:
1) provide a local operator at the AFW pump station for those operatiqnal situations when local operation may 'be needed, 2) provide for a cooli,ng water supply from. the CST to the lube pj] cooler, and 3) provide for manual operation of the AFW system,
ADDITION SHORT-TERM RECOMMENDATION
'1 The FPL submittal of December 20, 1979 was in error regarding the redundancy of Condensate Storage Tank (CST) level indication and alarms.
The information provided herein supersedes the December 20 information.
A redundant CST level indication system with associated low level alarms is being designed.
The', system is scheduled
'to be operable by January 1', 1981, pending material availability and unit outage time.
ADDITIONAL LONG-TERM RECOMMENDATION 3 Procedures will be in place by January 1,
1981 to provide operator direction regarding isolation of AFW system steam line or. feedwater line piping breaks.
'Procedures regarding unit shutdown using other available means will also be in place by January 1,
1981,.
In conjuction with the above procedures, steam and feedwater piping modifications are being developed to ensure redundancy in what are now common sections of piping.
The modifications are planned during the upcoming Unit 4 steam generator replacement outage, currently scheduled to begin in the Fall of 1981.