ML17338A719

Forwards Schedule for Plant Mods Re Fire Protection & Addl Info Re Safety Evaluation,Per 790321 Request

ML17338A719
Person / Time
Site:	Turkey Point
Issue date:	05/21/1979
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	Schwencer A Office of Nuclear Reactor Regulation
References
L-79-128, NUDOCS 7905290143
Download: ML17338A719 (16)

Text

REGULA' INFORMATION DISTRIBUTI YSTEM (RIDS)

ACCESSION NBR t 7905290143 DOC i DATE ~ 79/05/21 NOTARIZED! NO DOCKE FACIL:50 250 TURKEY POINT PLANTg UNIT 3p FLORIDA POWER AND LIGHT C 50 251 TURKEY POINT PLANTi UNIT 4 p FlORIDA POWER AND lIGHT C 05 AUTH~NAME AUTHOR Af FILIATION UHRIGiR ~ Ee FLORIDA POWER 8 LIGHT CO, RECIPeNAh1E RECIPIENT AFFILIATION SCHWENCERiA ~ OPERATING REACTORS BRANCH 1 SUBJECTS FORWARDS SCHEDULE FOR PLANT MODS RE FIRE PROTECTION 8 ADDL INFO RE SAFETY EVALUAT'IONiPER 790321 REQUES'ro DISTRIBUTION CODEe A001S COPIES RECEIYED:LTR ENCL SIZE!

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P.O. BOX 529100, MIAMI, FL 33152 FLORIOA POWER & LIGHT COMPANY May 21, 1979 L-79-128 Office of Nuclear Reactor Regulation Attention: Mr. A'. Schwencer, Chief Operating Reactors Branch gl Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Schwencer:

Re: Turkey Point Units 3 6 4 Docket.Nos. 50-250 6 50-251 Fire Protection In accordance with your letter of March 21, 1979 (Amendments 45 and 37 to Facility Operating Licenses DPR-31 and DPR-41, respectively), a schedule for the completion of plant modifi-cations related to fire protection is attached.

Additional information regarding incomplete items listed in Section 3.2 of the Safety Evaluation (enclosed with your March 21 letter) is also attached.

Very truly yours, obert E. Uhrig Vice President Advanced Systems G Technology REU/MAS/ms Attachment cc: Mr. James P. O'Reilly, Region II Robert Lowenstein, Esquire VODKA90l(/$

PEOPLE... SERVING PEOPLE

ATTACHMENT Re: Turkey Point Units 3 s 4 Docket, Nos. 50-250 6 50-25l Pire Protection X. Plant Modification Schedule XX. Water Supply (NRC Safety Evaluation Section 3.2.3)

,~ ~

t P3KLIMINABY MODXFICATXON SCHEDULE t

TURKEY POXNT UNXTS 3 6 4 PIRE PPL's PROTECTION'ngineeering NRC NRC Proposed Design Submittal Approval Implementatic Com letion Date Date I 3.1.1 Pire Detection

~Ss t.

1 2.3 Nov. 1979 Dec. 1980 4,5 Sept. 1979 Sept. 1979 Nov. 1979 Dec. 1980 Nov. 1979 Dec. 1980 7,8 Nov. 1979 Nov. 1979 Dec. 1980 9,10 Nov. 1979 Dec. 1980 ll Peb. 1979 3.1.2 Pire Mater

~Su ~1 Sept. 1979 Sept. 1979 Nov. 1979 Dec. 1980 1.2 Nov. 1979 3.1.4 Pirehouse Nov. 1979 3.1.5 Xnterior Hose Stat>on Nov. 1979 Dec. 1980 Nov. 1979 Nov. 1979 Dec. 1980 Nov. 1979 Dec. 1980

3. 1. 6 Naser

~Sstem Sept. 1979 Sept. 1979 Nov. 1979 Dec. 1980 3.1.7 Poam Su ression Nov. 19'79 Sept,. 1979 Sept. 1979 Nov. 1979 Dec. 1980

PPL' Engineering 'RC NRC Proposed Design Submittal Approval Xmplementatio I'tom Com leti'on Date 'ate 'S'ee (*)

3.1.8 Portable L'xtruguishers Nov. 1979 3.1.9 Pire Doors Nov. 1979 Nov. 1979 Dec. 1980 ci 2,3,4 ' Nov. 1979 Dec. 1980 k$

V Nov. 1979 Nov. 1979 Dec. 1980 Nov, 1979 Dec. 1980 1 ,Nov. 1979 Dec. 1980 2 -

Nov. 1979 Nov. 1979 Dec. 1980 3 Nov. 1979 Dec. 1980

3. l. 11 Penetrations 1/2 Nov, 1979 Dec. 1980 3.1.12 Barriers 1 Nov. 1979 Dec. 1980

.3 . 1. '13 Curbs 1,2,3,4 Nov, 1979 Dec. 1980 3.1.14 Pire Retardant Cable Coatin s Jan. 1979 2 Jan. 1980 3,4,5 Jan. 1979 3.1.15 Control of Combustibles Sept. 1979 Sep't. 1979 Nov. 1979 Dec. 1980 2 Nov. 1979 Dec. 1979 3 Nov. 1979 Jan. 1980 Nov. 1979 Dec. 1980 Jan. 1980 6,7 Nov. 1979 Dec. 1980

FPL' Engineering NRC NEC Proposed Design Submittal Approval Implementatio Item Com letion Date Date 3.1.16 Fire Fighting Access Jan. 1980 3.1.17 Smoke-Ventin EcCE~i> .

Dec. 1979

3. l. 18 Air Breathing EqEui Dec. 1979 Light:in Nov. 1979 Dec. 1980 Nov. 1979

tern 3.2 ' Smoke Detection No Modification Identified

~ss To Date

3. 2. 2 Reactor Coolant No Modification Identified

~Pum To Date See Enclosure II 3.2.4 Auxiliary Building See PP6L letter dated April 5, Corridor 1979 L-79-77

3. 2. 5 Cable S readin Room See FPGL letter dated April 5, 1979 L-79-77

3.0

SUMMARY

OF MODIFICATIONS AND INCOf1PLETE ITEtlS 3.1 tlodifications The licensee plans to make certain plant modifications to improve the fire protection program as a result of both his and the staff's evaluations.

These proposed modifications are summarized below. The sections of this report which discuss the modificatio'ns are noted in parentheses following each item. Further detail is contained in the licensee submittals. The licensee will provide a schedule for all modifications within 60-days of the issuance date of this Safety Evaluation. All modifications will be completed by December 1980.

Certain items listed below are marked with an asterisk to indicate that the NRC staff will require additional information in the form of design details to assure that the design 'is acceptable prior to actual implemen-tation of these modifications. Me request that this information be sub-mitted within six months of the issuance date of this Safety Evaluation.

The balance of the other modifications has been described in an acceptable level of detail.

3.1.1 Fire Detection S stems Early warning automatic fire detection systems will be provided in the following areas:

(1) In the makeup air supply to the control room (5.1).

(2) In the kitchen area of the control room (5. 1).

(3) In the rod control equipment rooms (5.5).

(4) In the switchgear rooms (5.6).

(5) In the diesel generator rooms (5.7).

(6) In the charging pump rooms (5.8).

(7) In the chemistry laboratories (ho't and cold labs) (5.8).

(8) In the new laundry facility (5.8).

in" The licensee is reevaluating this commitment as part of the issues identified Section 3. 2.4 and 3.2.5. Me will require that this, or an equivalent improvement be made.

3-1

Hoditications will be made f'r if required to insure an unimpeded flow path smoke for the vertical control boards and freestanding panels to the smoke detectors located in the false ceiling of'he control room (5.

1).'l0)

.Remote alarm lamps will be provided for the smoke detectors located above the false ceiling in the control room (5. 1).

A fire watch patrol will be established to inspect the lower level of the turbine area at a frequency of once per hour (5. 12).

Fire Mater Su 1 adequately'ized spool piece connection will be provided w'ith gated .

valves on the fire water loop and the discharge header of the screen wash This connection will not be permanently installed (3.2.3 and pumps.

4.3.1.1). ':

3.1. 3

'n ~Yd A

at d d 2b-inch gate valve one of'he two will be provided at the hose. house for installation outlet ports at the yard hydrants (4.3.1.3).

The equipment in the yard hydrant hose cabinets will be augmented by the addition of one portable hand light, a hose clamp, one 2<-inch fog nozzle-with shutoff valve, and two 1~>-inch spanner wrenches (4. 3. 1. 3).

'3.1.4 Firehouse E ui ment The complement of equipment in the firehouse will be augmented by the addition of eight portable hand lights, a forceable entry tool, two 2<-inch by 24-inch double female adaptors, and protective clothing to outfit eight men. Storage facilities will be provided in the firehouse for two smoke six air breathing units, spare fire hose, gaskets, and nozzles 'jectors, (5.13.

6).'.1.5 Interior Hose Stations Booster hose stations with low flow capacity shutoff nozzles will be provided with sufficient hose reach for all of the. following areas:

(1) Control room (5. 1).

(2) Cable spreading'oom (5.2).

(3) Switchgear rooms (5.6).

The licensee is reevaluating this commitment,.as part of issues identified i' Section 3.2.4 and 3.2.5. Me will require that this, or an equivalent improvemen ,

be made.

3" 2

3.1.6 9/ater Su ression S stems (l) Fixed automatic water spray protection will be provided for the door and ventilation openings of the switchgear rooms which face main and.auxiliary transformers (5.6).

~

3.1.7 Foam Su ression (1) Portable foam suppression equipment will be provided (4.3. 1.6).

(2) A means will be provided for introducing foam from a portable foam system into the diesel generator rooms and diesel fuel oil day tank raoms (5. 7).

3.1.8 Portable Extin uishers Two portable 2, gallon pressurized water extinguishers will be provided ir..

the control room (5. 1).

3.1. 9 Fire Doors in the following areas will be replaced with rated fire doors as I'oors noted:

(1) Access doors from cable spreading area to turbine building - 1',-hour rating (5. 2).

(2) Access doors from switchgear room to transformer area - three-hour .

rating (5. 6).

1<-hour-(3) Access doors from switchgear room to east turbine area rating with fuse link dampers, normally closed (5.6).

(4) Access doors'o diesel day tank rooms (5.7).

(5) Corridor access doors in the auxiliary building leading to the chem-istry laboratories (hot and cold labs) and new laundry facility-three-hour rating (5.8).

(6) Access doors to containment electrical penetration rooms 14-hour rating (5.9).

The .licensee is reevaluating this commitment as part of issues identified in made.'-3 Sections 3.2.4 and 3.2.5. Me will require that this, or an equivalent improvement.,

be

~RD (l) Three-hour rated fire dampers will be provided in the ventilation openings of the switchgear room which faces the transformer areas. These dampers will be normally closed (5.6).

The chemistry laboratories (hot and cold labs) and the new laundry facility will be isolated from the auxiliary building corridor by the use of 3-hour fire dampers in ventilation openings (5.8).

(3) The side wall,vent openings in the containment electrical penetration rooms will be protected by l~-hour fire dampers

3. 1.

(5.9).'enetrations, 11 (1) The openings between the floor and south wall of the upper level of the

'witchgear rooms will be sealed (5.6).

(2) Penetrations in the. wall separating. the diesel generator units and between the diesel generator units and day tank rooms will be sealed to provide a three-hour rated fire barrier (5.7).

3.1.12 Barriers A barrier will be constructed to impede heat and smoke from entering the diesel generator rooms via the louvered openings facing the outdoor fuel oil storage tank (5.7).

3.'1.13 Curbs (j) Curbs will be provided for the doors on the lower level of the switchgear rooms (5.6).

(2) A curb will be provided at the doorway in the west wall of the south

'iesel generator room (5.7).

(3) A curb will be provided at the doorway in the north wall of the Unit 3 charging pump room (5.8).

(4) Curbing will be provided around each auxiliary teedwater pump (5. 12).

3. 1. 14 . Fire Retardant Cable Coatin s Cables in trays with safe shutdown related cables in the following areas.

will be covered with a flame retardant coating:

'he licensee is reevaluating this commitment as part of'he issues identified in Sections 3.2.4 and 3.2.5. >le will require that this, or an equivalent improvement, be made.

3-4

(1) Inverter room (5.3).

(2) Containment (5. 10).

(3) Lower level of turbine area (5. 12).

(4) Auxiliary feed pump area (5. 12).

(5) In the vicinity of the condensate storage tank and transfer pumps (5.13).

3. l. 15 Control of Combustibles The use of the hydrogen supply lines in the auxiliary building corridor will be discontinued and new lines will be provided for use outside of this area (5.8).

(2) barrels in the auxiliary building used to collect radiation

'lastic protective clothing will be replaced with barrels made of a fire retardant material (5.8).

The hydraulic coupling oil cooler lines on the charging pumps will be replaced with lines made of a noncombustible material (5.8).

The control point guard house at the entrance of the auxiliary building will be replaced by a structure of noncombustible construction (5.12).

(5) The oil dispensing station at the south end of the turbine area will be relocated to an area which will not expose safety-related systems (5. 12).

The flammable chemical storage located on the ground floor of the turbine area will be relocated (5. 12).

(7) Isolation valves will be provided within the diked area of the outdoor diesel fuel storage tank for the feed lines to the transfer pumps. Manual bypass valves will be provided for the fail-closed isolation valves (5. 13).

3. 1. 16 Fire Fi htin Access (l) Unused portions of cable trays in the containment electrical penetration rooms will be removed to'mprove fire fighting access. Fixed ladder-access wil'1 be provided for all levels of the penetration .rooms (5.9).

The licensee is reevaluating this commitment as part of the issues identified in Sectio'ns 3.2.4 and 9.2.5. >Ie will require that this, or an equivalent improvem nt, be made; 3-5

3. 1. 17 Smoke Ventin E ui ment Two fire service portable smoke ejectors of the explosion proof type with a capacity of 5,000 cfm or, greater will- be provided for fire brigade use (4.4. 1).

3. 1. 18 Air Breathin E ui ment Air breathing equipment will be augmented to provide a total of 15 self-containe air breathing apparatus and 30 spare air cylinders. At least 15 of the spare cylinders will be fully charged. Six air cylinders will be stored a readily accessible location neai the control room. A 6-bottle cascade

't system capable of'efilling 23 air bottles will be provided (4.4.2).

3. l. 19 Emer enc Lit htin Fixed seal beam self-contained battery-operated lighting units will be provided in the control room, auxiliary building corridor, cable spreading room, and switchgear rooms (4.6).

(2) Portable seal beam battery"operated lights will be provided for fire brigade and emergency operations personnel use (4. 6).

3.2 Incom lete Items In addition to the licensee s'roposed modifications, a few incomplete items remain, as discussed below. The sections of this report which discuss these incomplete items are noted in parentheses. 9/e will address the resolution of incomplete items in a supplement to this report. Your submittal should include a schedule for any additional modifications, such as may'be required as a result of the resolution of the incomplete items.

3. 2.1 Smoke Detection S stems Bench tests will be conducted on a minimum of 50K of the installed smoke detectors in each zone to verify that the detectors will provide prompt response and have adequate sensitivity to the products of combustion for the combustibles in the areas where they are installed. If detection systems are f'ound to be inadequate,'ppropriate modifications will be made to provide adequate detection system performance.

(2) With regard to the adequacy of'he smoke detection systems, we have requested in situ testing be conducted w>th a suitable smoke generation device 'hat to verify that the location and placement of smoke detectors is adequate to give prompt response and. that the ventilation air flow patterns in the area do not significantly reduce or prevent detection system response.

The licensee has not found a suitable means to conduct such tests in a manner which does not introduce further safety considerations. Further action is being taken in the developm nt of a suitable test method.

However, if a practical solution to this type of testing cannot be estab-lished within six months of the date of this Safety Evalua-tion, an evaluation by an independent registered fire protection engineer (as defined in our guidance dated February 23, 1978 attachment 1 page 3. }

knowledgeable in fire detection will be performed within nine months of the date of this Safety Evaluation to certify the adequacy of smoke detec-tion systems in lieu of in situ testing. No additional information is requested from the licensee (4.2).

Reactor Coolant P~um s Me have requested that an oil collection system be provided for each of the reactor coolant pumps. The licensee has deferred action on this recommendation pending the final resolution of an EPRI study, "Evaluation and Test of Improved Fire Resistant Fluid Lubricants for Mater Reactor Coolant Pump Motors." If a suitable lubricant is not found, the licensee provide a system to suppress potential fires or provide for the 'ill removal ot potential oil leakage to a saf'e location by December 1980. No additional information is required from the licensee (5. 10):

Mater Su ly Me have requested that an adequate supply of water for fire protection be physically dedicated (e.g. by a vertical standpipe). Me have requested that the licensee confirm his calculations on the adequacy of the screen

'ash pumps, as an alter nate source of water for fire fighting, to meet the maximum area of demand for fixed systems. Me will request, should the screen wash pumps prove to be an adequate alternate water source, that the spool piece, which the'icensee proposed, be permanently connected to the-screen wash system to provide a completely redundant water supply. Mhen the above information on the water demand is available. we will evaluate and report our findings in a supplement to this report.

it This information will be provided within 60 days from the date of this'afety Evaluation (e.3.1).

Auxi 1 i ar Bui 1 din Corridor Me have requested the installation of sprinklers to provide protection for safety-related cables from exposure fires in the auxiliary building corridor.

Me have also requested additional information in our letter dated March 2, 1979 regarding the shutdown of both units following a fire in this area..

After our review of the additional information we will report on the adequacy of the fire protection for the Auxiliary Building corridor (5.8).

Cable S readin Area It is our position that a capability independent of the cable spreading room should be provided to safely shutdown both units. Me have re'quested additional information from the licensee in our letter dated triarch 2, 1979 3" 7

to demonstrate that both units can be shut down independent of a fire in the cabling and equipment located in the cable spreading room. After we have reviewed the additional information we will report on the adequacy of the fire protection plans for the cable spreading room (5. P).

Technical S ecif'ications for Existin E ui ment On November 8, 1978 amendments 42 and 34 were issued with limiting condi-tions for operation and surveillance requirements for existing fire protec-tion systems and administrative controls. Certain exception taken by the licensee were identified as being subject to further staff review. The staff position in regard to those items is unchanged. No additional information is required from the licensee.

3-8

WATER SUPPLY Florida Power 6 Light Company (FPL) has evaluated the hydraulic sprinkler demand calculations for the Turkey Point Unit 4 Wet Pipe Sprinkler System. Due to the zonal nature of the sprinkler system, FPL has determined that the largest area is located under the Unit 4 turbine operating floor between columns 30.1 and 32.1 North/South and between columns E and A East/West, including the condensate pump pit,, for a total area of 3945 square feet:.

However, by precluding an unmitigated oil fire from flow-ing into the condensate pump pit, this area of concern can be effectively reduced to 2685 square feet. Based on the smaller area, FPL has confirmed the adequacy of the fire pumps and the screen'ash pumps as follows:

l. Assuming one fire pump is supplying the wet. pipe system under the North end of the turbine deck on Unit 4, and the wet pipe system is operating in its entirety, the total flow would by 2090 gpm at 145 psig. 750 gpm would be utilized for fire hose streams, leaving 1340 gpm for the wet pipe system.

This provides about 0.50 gpm/ft to the area of concern.

2. Assuming one screen wash pump (connected to the fire main) is supplying the wet pipe system under the North end of the turbine deck on Unit 4, and the wet pipe system is operating in its entirety, the total flow would be 1600 gpm at 63 psig. 750 gpm would be utilized for hose streams, leaving 850 gpm for the wet pipe system. This provides about 0.32 gpm/ft to the area of concern.

We propose to install curbing to preclude an unmitigated oil fire from flowing into the condensate pump pit.