ML19257B927

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Forwards Response to NRC 790727 Request for Addl Design Info Re Fire Protection Program Mods.Requests Expeditious Review of Info to Complete Mods at Facility
ML19257B927
Person / Time
Site: Crystal River 
Issue date: 01/15/1980
From: Baynard P
FLORIDA POWER CORP.
To: Reid R
Office of Nuclear Reactor Regulation
References
NUDOCS 8001210256
Download: ML19257B927 (8)
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  1. d[O cocco Florida Power CO M PO R A T aO N January 15, 1980 File:

3-0-3 a-3 Mr. Robert W. Reid Chief Operating Reactors Branch #4 U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Fire Protection Program Modifications

Dear Mr. Reid:

As of January 8,1980, Florida Power Corporation had submitted all information relating to the completion of modifications regarding fire protection at CR-3 except Item 3.14.

At ths.t time, we said additional information regarding Item 3.14 would be rent at a later date. We are now enclosing our response to Item 3.14.

This submittal completes Florida Power Corporation's response to the NRC's request for additional design information as listed in Section 3.0 of the Safety Evaluation of Amendment 23, dated July 27, 1979.

Your expeditious review of this information will be greatly appreciated in order that these modifications can be completed at CR-3.

If you require any additional information or wish to discuss our submittal, please contact us.

Very truly yours.,,

FLORIDA POWER CORPORATION 9%

Dr.

. Y. Baynard Manager, Nuclear Support Services PYBemhM15D47 074 119 smusio a j fg General Office 3201 Thirty-fourin street soutn. P O Box 14042, st Petepour f4orda 33733 813-866-5151

FPC RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION NRC ITEM 3.14 Cable Spreading Room Floor and Ceiling The cable spreading room floor will be coated / insulated to provide a one-hour fire resistance.

The metal plates in the ceiling will be coated with a three-hour fire resistance rated material.

FPC RESPONSE TO ITEM 3.14 The metal plates in the Cable Spreading Room ceiling are actually spare cable duct which lead from the Cable Spreading Room to the Con-trol Room. Presently, metal plates are attached to both ends of the duct to prevent air flow between the two rooms.

FPC proposes to pack the entire length of the duct (approximately 12") with B&W Kao Wool, then replace the end plates and coat all exposed metal surf aces of the duct with 1/2" wet thickness of Flamesmastic 77.

To prevent propogation of fire between the Cable Spreading Room and ES Switchgear Rooms, the entire 1/4" checkered steel Cable Spreading Room floor will be protected by applying 1/4" thick Intumescent sheet to the floor physically protected in walkways by an 1/8" alunimum plate factory bonded to the top side of the sheet.

This sheet material was developed and tested by the 3M Company, product brochure and test re-sults attached.

In areas where physical protection is not needed for the Intumescent sheet, between grouped conduits in the floor an under air-conditioning ducts, a top side of the sheet will have an aluminum foil bonded to it.

The physical size of each sheet will be approxi-mately 28" x 22"; they will be bonded to the 1/4" checkered steel floor by a pressure sensitive adhesive and installed much like vinyl floor tile.

This bonding of material will allow the Intumescent sheet to expand upward and outward if a surface temperature of 250*F is reached.

This submittal is the last one required by the NRC with regard to the Fire Protection Safety Analysis Report.

PYBemhM15D47 e

1774'12f0

STATE OF FLORIDA COUNTY OF PINELLAS P. Y. Baynard states that she is the Manager, Nuclear Support Services of Florida Power Corporation; that she is authorized on the part of said company to sign and file with the Nuclear Regulatory Commission the information attached hereto; and that all such statements made and matters set forth therein are true and correct to the best of his knowledge, information and belief.

r.

J

~

/. YV Baynalde Subscribed and sworn to before me, a Notary Public in and for the State and County above named, this 15th day of January,1980.

Notary Public Notary Public, State of Florida at Large, My Commission Expires: August 8, 1983 CameronNotary 3(D12) iT74121

November 1,1979 3M Brand Fire Barrier Sheet FS-195

  • Intumescent in all directions
  • Fiexible
  • Heat barrier
  • Smoke barrier
  • Strong char
  • Weatherable
  • Non-flame supporting Underwriters Laboratories Approved
  • Listed in the Fecognized Component Directory
  • File Number F8399, Product Category OEXL A

IR 100 Award Winner in 1979 On September 20,1979, the publishers of Industrial Research/ Development magazine recognizec the FS-195 sheet as one of the one hundred most innovative new products introduced by American in-dustry in 1979.

Intumescence - (Expands when heated)

The fine of 3M Brand Fire Barrier products are all designed to take full advantage of the intumescent properties of the component materials. Because of its rubber nature, this material provides an ex-ceptionally good smoke barrier when close contact is made between the Fire Barrier material and its surrounding parts.

And now 3M has provided a new dimension to fire protection. Heat, instead of cestroying the seal, activates it to tighten the closure. Fire Barrier absorbs heat. The more it absorbs, the more it excands.

Holes created by burning cable insulation or distortion and buckling of metal components are resealed as the Fire Barrier expands. The char created is very strong. It resists the pressure of fire hose water to dislodge the material and prematurely exocse the protected area.

Applications:

Fire Stooping Surface Protection:

<See Paragraon 300 21 of tre National Electrical Cocer

  • Cable.vrap
  • Poke throughs
  • Cat!e t. ray crotection
  • Cable raceway protection U 7 4 122 '

3M will supply parts cut to size or the material can be cut on site using shears. If adhesive is desired, ask for 3M's recommendation.

d Alternative Forms of Sheet Material:

Facings:

- Thickness:

  • Standard

.250"

  • Minimum

.125"

  • Steel plate Maximum

.500" Plastic

  • Fiberglass composites Design:
  • Cardboard

. Basic sheet 28" x 22" x 1/4"

  • Others

. Die cut product to specific designs

  • Molded configurations
  • Larger sheets Specifications Activation Expansion begins 250 *F. (120'C.)

Expansion is significant 350 *F. (175'C.)

Multi-directional free expansion 5 to 11 times, typical 8 times Weight loss 25 %

Expanded char strength 500 psi Refractory temperature 1740*F. (950'C.)

Dimensional Specifications:

Standard Length and Width 28" x 22" d

Tolerances:

Length and Width

.030 Thickness 2 89'o at.250 and above 2.020 under.250 Physical Properties:

- Thermal Conductivity:

  • FS 195 sheet as supplied and installed:

Char K (BTUlin/hrif t2/

  • F.)

(BTU /in/hr/f t2/

  • F.)

.32 @

75'F.

1.56 @ 95*F.

.51 @ 613*F.

1.81 @ 148'F.

.66 @ 1130

  • F.

Comparisons at 70*F.:

Comparisons at 75'F.:

Silicone 1.56 Vermiculite

.47 Chloroprene 1.32 Mineral Wool (loose)

.28 Mica Froducts 2.88 - 4.8 Fiberglass (loose)

.28 Styrofoam

.22 O

~

1774 123

N ov.1,1979 3M Brand Fire Barrier Sheet FS-195 Thermal Conductivity Test Condition:

Steel plate measuring.125" thick attached to FIRE BARRIER SHEET FS-195 measunng.250" thick and mounted over a 6" wide opening with metal plate up. Cold side thermoccuple placed on too of the steel plate.

Results:

Time (Min.)

Fumace Temp. (

  • F.)

Cold Side Temp. (*F.)

1 700 60 3

1,040 70 5

1,070 105 10 1,340 130 15 1,390 155 20 1,470 165 25 1.540 180 30 1,600 200 35 1,630 205 45 1,675 215 50 1,700 225 55 1,720 235 60 1,740 240 75 1,790 270 90 1,830 300 105 1,850 325 120 1.870 350 150 1,875 375 180 1,895 425 210 1,895 480 240 1,900 525 O

~

1 /74 124-

t i Plot of Results:

FIRE DARRIER TEMPER ATURE RISE AS A FUNCTION OF TIME 2100-O ni,n.co T.n,o.

1800-1500-1 1200-a.'s ia>

900-600-Cold Side Temp. -

300-0 25 50 75 100 125 150 175 200 225 250 TIM E -- Mt NUTES Test Fixture:

o Cer3meC SDdCer Thermocoucie l y coia Sace Temperature

,n, Mefan PWe i 125 ' steeq F re Barrier $heet FS 195 # 250" inic k i i

7 7

/

7 6"

7 46 Fireerick Furnace Too Thermoccuole Furnace Tempera'ure important nosece to puechesee - All statements. tecamcas information and recommendations contained merein are cased on tests me oeheve to be rehable. Det the ac-curacy or cornoleteness inereof is not guaranteed. and the toito.ing is made in lieu of asi.arranties. espress or ernched seaters and manvisciurer's on#y obstgation snait be lo repeace sucn quantity of tne product proved to be defectiva Neitner seiler not manufacturer snail be liso6e for any in:ury. loss or damage, direct or consequential, arismo out of the use of or the mabahty to use it's product Before using, user snasi determine the suiianibly of tne product for his intended use, and user assumes ait risk and liabihty whatsoever in connection inerewitn No statement or recornmendation not Contaened nereen snail nave any force or effect un4ss in an agreement signed by officers of seeles and manufacturer K LMO-F B2(109.5)R2 Litho in U.S. A.

O Technical Ceramic Products Division /3M 223-4SW 3M Center 4

St. Paul, Minnesota 55101

.t Vi A ' 612/736 1668 lII4

-1 5 Weatherability: Af ter Expansion p Elastic Nominal Test Condition Temperature Humidity Time Properties Expansion Air conditioned room 22*C. Excellent 8 Times Oven 87'C. 90 Days Very Good 5 Times Humidity Chamber 32*C. 95 % 90 Days Very Good 10 Times Water immersion 22*C. 60 Days Good 10 Times Floor Wax and Stripper 22*C. Dip 120 Days Excellent 10 Times Gasoline 22*C. Soak 60 Days Fair 5 Times Methyl Alcohol 22*C. Soak 60 Days Good 4 Times Weatherometer OUV ASTM 53-77 2,650 Hours Excellent 12 Times Weatherometer XW ASTM G-23-69 1,640 Hours Fair 10 Times Dielectric strength: (ASTM D 149) as supplied 242 volts / mil average 200 volts / mil minimum Flame spread: Will not support flame. Hardness: 55 to 70 shore A Compression set: 25% max. (ASTM D-395, Method B) Color: As supplied - brown; char - black. Suggested Specification Statement Fire Stopping All wall and floor penetrations will be protected against spread of smoke and fire with an intumescent sealing material such as 3M Brand Fire Barrier which is suitable for varying environmental conditions including direct expostare to water and wMch carries approval of a recognized testing laboratory such as Underwriters Laboratories. Surface protection The surface area identified will be protected against damage by fire with an intumescent coating material such as 3M Brand Fire Barrier which is suitable for varying environmental conditions in-cluding direct exposure to water and which carries approval of a recognized testing laboratory such as Underwriters Laboratories. U.S. patent applied for. 1774I'26-O}}

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