L-80-346, Updates Mod Plans & Provides Addl Info Re Fire Protection Plan
| ML17340A291 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 10/20/1980 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| L-80-346, NUDOCS 8010240216 | |
| Download: ML17340A291 (8) | |
Text
REGUL'ATO, INFORMATION DISTRIBUTIONS STEM (RIDS)
, ACCESSION NBR 8010240216 DOC ~ DATE: 80/10/20 NOT'ARIZED NO DOCKET' FACIL:50 250 Turkey Po,int Planti 'Unit )E Flor.ida. Power and Light C
d5000250 50-251 Tur key Point-P~lant~
Unit 4E Flor ida: Po'wer and L~ight C
05000251 AUTH,NAME AUTHOR AFFILIATION UHRI G,e R ~ E ~
F~lorida, Power 8 Light-Co,.
REC IP ~ NAME R EC'I P>I ENtT AFFIL'IA TION VARGAES ~ AD Operating'Reactors Branch 1
SUBJECT; Updates mod plans L provides addi i.nfoT re fire protection
- plan, DISTRI SOT I ON CDDE:
A0060 COPIES RECEIVED:LiTR P 'NCLit2 SIZE:~
TITLE: Fire Protection Information (After Issuance of OP' Lic ~ )
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FLORIDA POWER 8L'IGHTCOMPANY October 20, 1980 L-80-346 Office of Nuclear Reactor Regulation Attention:
Mr. Steven A. Varga, Chief Operating Reactors Branch gl Division of Licensing U-S. Nuclear Regulatory Commission Washington, D.
C.
20555
Dear Mr. Varga:
RE:
TURKEY POINT UNITS 3 8 4 DOCKET NOS.
50-250 8( 50-251 FIRE PROTECTION The Facil:ity Operating Licenses for Turkey Point Units 3 and 4 require Florida Power 5 Light Company to "complete the modifications indentified in Paragraphs
- 3. 1. 1 through 3.1.19 of the NRC's Fire Protection Safety Evaluation, dated March 21, 1979..."
The purpose of this letter is to update our modification plans and provide information that has been discussed with the NRC Staff.
It is our understanding that the Staff finds the information acceptable.
Item 3.1.6 In our letter of May 7, 1980( L-80-140),
we noted that:
The Fire Protection SER states that fixed water spray protection will be provided for the doors of the switchgear rocms which face the main and auxiliary transformers.
We have reconsidered this fire protection modification and we have decided to remove the existing door in each switchgear room that faces the transformers area.
We will block up each door opening with an appropriate 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire rated wali'his change affects the following fire protection SER requirements:
3.1.6 (Water Suppression),
3.1.9 (Fire Doors) Section (2),
and 3.1.13 (Curbs)
Paragraph (1)-
Due to problems encountered in the implementation of this modification, we have decided not to block the door openings.
We will, however, meet the intent of the USNRC's concern by providing a roofed labyrinth entrance (with a raised floor) and fire rated door at the existi ng entrances through the south wall of both the 3B and 4B 4160 V switchgear rooms.
The effective fire rating of the labyrinth-door combination will meet or exceed the requirement for protecting against the exposure hazard presented from the area external to the switchgear rooms.
- However, since fire rated z
g doors are long-lead procurement items (approximately 8 months), it is our intent to install Maranite board over the existing doors on an interim basis in conjunction with the raised floor and labyrinth until the fire 88>0340 PEOPLE... SERVING PEOPLE
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Office of Nuclear Reactor Regulation Page 2
rated door/frame assemblies arrive.
This modification was discussed with Mr.
G. Harrison of the USNRC and was found to be conceptually acceptable.
Item 3.1.12 In our letter of June 20, 1980 (L-80-196),
we notified the USNRC of our intent to provide sprinkler heads on the outside wall of the diesel generator building as a means of r educing the potential for damage to the Diesel Generator system from a fire in the fuel oil storage tank.
Through subsequent discussions with Mr. G-Harrison of the
- USNRC, we were informed that this alternative would be acceptable with certain modifications.
Based on this discussion, we have revised the system as described below:
There are a total of four 9' 7'ouvers, two for each diesel'ne is on the north, two are on the east, and one is on the south wall of the building with an oil spill dike between the tank and the buil:ding.
Each louver will have a total of four nozzles (Grinnel Protectospray Type D3 large capacity with No. 48 orifice, 0.750", 95'eflection or equivalent).
The spray will cool the metal 1'ouvers and missile shields, and will reduce the induction of particulate matter from smoke.
The system supply will be a 4" line with a locked closed supply valve with breakable chain and lock.
Actuation wil'1 be manually initiated by opening the supply valve after verification of a valid diesel generator building fire alarm due to a fire within the berm surrounding the emergency diesel generator fuel storage tank.
The water supply line will come from the turbine building system about 40 feet west of the diesel generator,buil,ding.
Total pipe length is approximately 125 feet.
Item 3.1.15 4
The staff concern in this section of the Safety Evaluation is that the Control Point Guardhouse at the entrance to the Auxiliary Building creates an exposure hazard to cable trays in the vicinity.
Through Mr.
G. Harrison of the
- USNRC, we have arrived at a cost effective alternative to construction of a new Control Point Guardhouse.
The alternative, a sprinkler system, will allow FPL to assess its long term needs regarding access/egress control and personnel radiological monitoring in the Radiation Controlled Area, while adequately addressing the Staff's concerns.
The sprinkler system will consist of three sprinkler heads mounted between the roof of the existing Control Point Guardhouse and the bottom of the cable
- trays, one sprinkler head above the Control Point Guardhouse, and two sprinkler heads inside the Control Point Guardhouse.
The six sprinkler
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Office of Nuclear Reactor Regulation Page 3
heads will be 165'F fuseable element.
The water supply line will come from the turbine building system about 1'2 feet above the roof of the Control Point Guardhouse.
Very truly yours, Robert E. Uhrig Vice President Advanced Systems 5 Technology REU/HAS/WAK/ras cc:
J.
P. O'Reilly, 'Region II Harold F.
Rei.s, Esquire
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