ML19316A755

Forwards Revised Pages of Responses to Section 3.1, Mods & 3.2, Incomplete Items of Fire Protection Safety Evaluation Rept.Discusses Fire Stop Penetration Tests on Fire Protection Sys

ML19316A755
Person / Time
Site:	Calvert Cliffs
Issue date:	05/20/1980
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Office of Nuclear Reactor Regulation
References
L-037-F, L-37-F, NUDOCS 8005270460
Download: ML19316A755 (71)

Text

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

',o a - 8 BALTIMORE GAS AND ELECTRIC COMPANY P. O. BOX 1475 BALTIMORE, M ARYLAN D 21203 May 20, 1980 ARTHt R [.. LUNDVALL.JR.

vics Passioce.t Su ppLv Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Attention:

Mr. Robert W. Heid, Chief Operating Reactor Branch #4 Division of Operating Reactors

Subject:

Calvert Cliffs Nuclear Power Plant Units No. 1 & 2, Docket No. 50-317 C 50-318 Fire Protection Safety Evaluation Report and Amendments to Facility Operating License File:

013-261-0, L-037-F

Reference:

(1) NRC letter transmitting the SER, dated September 14, 1979 from Reid to Lundvall, same subject (2) BGCE letters from Lundvall to Reid on the same subject dated:

November 13, 1979 December 21&27, 1979' January 11C29, 1980 Gentlemen:

On March 7, 1980, Sbuthwest Research Institute performed a fire test in accordance with Baltimore Gas and Electric Company specification " Fire Test Procedures for Cable and Pipe Penetrations" dated January ll, 1980. The results of the test are recorded in Southwest Research Institute Final Report dated Apri' 10, 1980 cntitled " Fire Stop Penetration Tests on Fire Protection System, Project No. 03-5980-001."

Three'copics of the bound test report are attached.

Also, please find forty copies of revised pages of our responses to Section 3.1, " Modifications" and Section 3.2, " Incomplete Items." This enclo-sure provides the current status and commitments.

With respect to Item 3.1.13

" Emergency Communications," we have com-pleted the installation of sound powered phones except for those six phones required within Unit 2 Containment. This work is currently scheduled to be completed during the next refueling outage of Unit 2.

.Very truly y.

s, cc:

J. A. Biddison, Esquire 4'

p, C. F. Trowbridge, Esquire Messrs. E. L. Conner, Jr. - NRC

[

J. W. Brothers - Bechtel 8006270

_ l

3.1.2

Response

The equipment identified above has been purchased and is available at the site. This item is completed.

3.1.3 Fire Water System Overpressurization (4.3.1.3)

The licensee will identify and correct the cause of the fire water system overpressurization.

Response

As indicated in previous BG&E submittals dated April 19 and August 6, 1979, the cause of "overpressurization" has been identified with the on-off operation of the electric motor driven fire pump and its check valves. One half inch pressure relief valves are to be installed on all thirteen alarm check valves which trap pressure surges. These relief valves will be set to open at 175 psi. These pressure relief valves will be installed by October, 1980.

3.1.4 Marking of Fire Water Valves (4.3.1.3)

The licensee will provide identification tags clearly marking post-indicator valves and control valves for fire protection water systems so that reference to written descriptions or reference number is not necessary to identify the systems or areas each valve controls.

Response

Each valve in the fire suppression water system, excluding instrument stops, has been provided with an identification tag. These are stain-less steel tags which identify the valve by number and provide suffi-cient description te facilitate the identity of the valves function by a qualified operator. This item is completed.

3.1.5 Breathing Apparatus Recharging System (4.4.3)

The licenses will:

(1) relocate the recharging system from the present location in ware-house No. I to a suitable central location within the Unit 1-Unit 2 operating area, (2) provide cooling water tank for each cascade system for air cylinders being recharged.

l 4

Revised: 5/20/80 I

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i 3.1.5

Response

The recharging system has been relocated from Warehouse No. I to a central location within the Service Building. This item is com-pleted.

3.1.6 Automatic Fire Suppression in Cable Spreading Rooms The licensee will install an automatic fire suppression system in each cable spreading room.

Response

A fixed automatic Halon 1301 fire suppression system is being designed and will be installed for each of the Cable Spreading Rooms. Its scheduled in service date is October, 1980.

3.1.7 Fire Water System Valves (4.3.1.1, 4.3.1.3)

The fire water tank discharge valves are locked open. The fire water tank interconnection valve has been locked closed. All locked valves in the fire protection system will be checked monthly to verify their position.

Response

As indicated above in the SER, this item has been completed.

i 3.1.8 Miscellaneous Usage of Fire Water (4.3.1.1)

An additional centrifugal pump, taking suction from the fire water tank standpipe and discharging to the fire pro.ection system header, will be installed with adequate capacity to meet Gie intermittent use of fire water for purposes other than fire protection. Administrative procedures will be implemented to limit such usage of fire water to a single 1-1/2" hose stream at any time.

In the event of a fire, non-fire fighting water usage will be terminated immediately.

Response

An additional electric driven centrifugal fire pump is to be installed by October, 1980, in the Turbine Building. This pump will have ade-quate capacity to meet intermittent use of fire water for purposes other than fire protection. The pump will take suction from the fire water tank standpipe and will discharge into the fire protection system header. This pump will be arranged to start and stop automatically.

Administrative procedures have been established to insure that the fire system usage for purposes other than the fire fighting will be limited to a single 1-1/2" hose stream at any one time.

Revised:

5/20/80

t 3.1.9 3.1.9*

Low Water Tank Level Interlock (4.3.1.2)

The fire pump controller will be modified to remove the fire water storage tank low level interlock from the control logic.

Alarms will be provided to annunciate, in both the control room and the fire pump house, low level in fire water storage tanks.

Response

The fire pump controller has been rewired to remove the pretreated water storage tank low level interlock from the fire pumps control logic. This modification prevents the fire pump from stopping on a low pretreated water storage tank level. The level switches on the pretreated water storage tank now provide pretreated water tank low level alarms which annunciate in both the control room and the fire pump house. This item is completed.

l 3.1.10 Single Isolation in Fire Water Piping System (4.3.1.3, 5.18', 5.30)_ ______.__.. _.

A 2-1/2" hose connected to Hydrant No. 5 will be prelaid to provide hose coverage for Diesel Generator Room No. 21, when the fire water supply to the automatic sprinkler system and manual hoses stations protecting these areas are valved out simultaneously.

Response

i As indicated in the SER, this item has been completed. Technical Specification No. 3.7.11.2, Unit 2 covers this condition and CCI 133 specifically addresses the temporary corrective action required.

3.1.11 Portable Smoke Ejectors (4.4.1)

Three portable smoke ejectors and associated portable ducting will be provided to aid in manual smoke removal. The ejectors will be of the explosion-proof type that are used for fire fighting and have a minimum combined capacity of 17,500 CFM.

Response

Three portable smoke ejectors and associated portable ducting have been provided to aid in manual smoke removal. The ejectors, two explosion-proof electric motor driven and one water-motor driven, provide a com-bined capacity of 17,500 cfm. This item has been completed.

Revised:

5/20/80

i 3.1.12 3.1.12 Battery Room Ventilation (4.4.4, 5.11)

Telltales have been installed at the exhaust and supply air grills in each battery room and the air flow is being verified twice each shift.

Response

As indicated above in the SER, this item has been completed and is-considered acceptable to the NRC staff as indicated in Section 4.4.4.

3.1.13*

Emergency Communication (4.7)

Communication _ equipment will be provided which is capable of maintaisi --

ing communication between the control room and all areas of the plant, including the interior of containment, considering possible damage due to a single fire.

Response

Existing plant communications systems include a page system and sound powered phone system which are capable of maintaining communications between the control room and all areas of the plant including the interior of the containment. A sound powered phone system will be installed to provide back-up communications from the control room, in the event of loss of normal communication during a fire. This system will consist of la remote sound powered phone jacks as shown on the attached draft Riser Diagram. Jacks will be located as follows:

(1)

Unit 1 and 2 Containments - 3 jacks each at El.10'-0", El. 45'-0",

El. 69'-0" in vicinity of east stairway.

(2)

Stairways AB-1 and AB 5 jacks each at El. (-)l5'-0", El.

S'-0",

El.

27'-0",

El.

45'-0", El. 69'-0" at stairway entrances, i

(3) Rooms 603 and 605 (Aux. Feed Pump Rooms - El. 12'-0") 1 jack each.

The system will be installed in such a way as to maintain adequate sepa-ration from existing communications facilities. East Electrical Pene-tration Rooms will be utilized for containment entrances to avoid a com-mon route in the west Penetration Room. No new cable will be routed through the cable apreading room. Five (5) circuits will be installed to minimize impairment of the remainder of the system due to a fire in any one area. New sound powc a d equipment will be compatible with the i

l existing system. These modifications have been completed except for sound powered equipment within Unit 2 containment which will be installed during the next scheduled refueling outage.

Revised:

1/11/80 5/20/80 y,--.

a-----

, +

3.1.14*

3.1.14*

Ilydrogen Piping (5.4, 5.8. 5.9)

An excess flow stop valve will be installed in the line to the hydro-gen supply to auxiliary building to automatically secure hydrogen to the building in the event of a piping system rupture.

Response

The attached drawings show the location and piping configuration for the installation of excess flow stop valves. The hydrogen piping has been modified during the last two unit outages to include isolation, bypass and flange connections. Operating procedures will be changed to open newly installed bypass valves to establish flow into the Auxiliary Building.

Upon completion of testing the newly installed excess flow stop valve, the system will be aligned with the excess flow auto stop valve in service and the bypass valve administratively locked in the shut position.

Revised:

5/20/80

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3.1.15*

Addition of Curbs (5.9)

The licensee will provide means to curb or contain a possible oil /

solvent spillage in the hot reachine shop and in the hot insttwnent shop.

Response

Eoth the hot machine shop and hot instrument shops have been provided with two inch curbs at their respective entrances to contain possible oil / solvent spillage to the rooms. These curbs are sufficient to con-tain 1640 gallons in the hot teachine shop and 425 gallons in the hot instrument shop. Calculations are shown below. This item is com-l pleted. _ _ _ _

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3.1.17 3.1.17 Dedicated Ladders (5.10)

The licensee has provided a dedicated ladder of fiberglass construction in each cable spreading room to provide access to the areas above the battery rooms and the overhead cable chases.

Response

As indicated in the SER, this item has been completed.

3.1.18 Miscellaneous Protection for Control Room (5.16)

(1) The licensee has provided a fog nozzle for the manual hose pro-tecting the room.

(2) All wooden furniture and shelves will be removed from the control room complex e tept for work benches in the Log and Test Instru-ment Room.

(3) Hetal partitions will be provided to separate the adjoining panels from the computer terminal in the middle of the main panel.

Response

As indicated above in the SER:

(1) The fog nozzle has been provided, (2) Wooden furniture and shelves have been removed except for work l

benches, and (3) A metal enclosure for printout paper has been provided as shown on the attached sketch.

This item is completed.

l 3.1.19*

Fire Detection in Safety-Related Areas (4.2, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 5.14, 5.19, 5.21, 5.27)

The licensee has proposed to install appropriate fire detection devices in some additional safety-related areas. We will further evaluate this modification when the design details become available.

Response

Submitted Lecember 21, 1979.

I Revised:

5/20/80 l

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3.1.20 3.1.20* Unprotected Doorways _ (4.9.1, 5.1, 5.2, 5.4, 5.5, 5.7, 5.16, 5.18, 5.22) ,L or FM listed fire doors of appropriate ratings will be installed, or acceptable alternate provided to protect the unprotected doorways in fire barriers separating various safety-related plant areas, including fivt dcorways in the computer rooms currently provided with nsafire rated bullet-proof doors.

Response

Submitted December 21, 1979. l 3.1.21* Manual Hose Coverage (4.3.1.4, 5.6, 5.12, 5.17, 5.19, 5.21, 5.24, 5.25 5.26, 5.28) The licensee has performed hose reach tests and proposed to provide several additional hose stations. We will further evaluate this modification when the design details become available.

Response

The results of the hose stretch test are attached herewith. Additional hose stations are to be added as shown on the attached drawings. Cross-hatched areas identify areas beyond reach of preconnected fire hose. Next to the crosshatched areas, we have identified the fire loading characterized by less than one pound of combustibles per square foot. These low fire loads do not justify extension of the standpipe and hose stations. The new hose station design and installation is shown on Figure E-1 of the Fire Protection Program Evaluation, Type C hose sea-tion detail. Fire brigade response is assured as the crosshatched areas are within rooms equipped with automatic fire detection. The fire brigade is trained in hose laying evolutions and additional hose, both 1-1/2 and 2-1/2 inch, are available in strategically located por-table equipment cabinets. Revised: 5/20/80 i

3.2.5 Spillage on Elevation -10'-O" and -15'-O" is drained to individual room sumps and then pumped to the wcste receiver tank. Check valves prevent l backflow to other rooms. At Elevation 5'-0" and above, spillage of combustible liquids in any given rcom will drain by gravity to the receiver tank. Connecting piping is sufficiently below the floor level to preclude transfer of combustibles to other safety related rooms. 3.2.6 Electrical Penetration Fire Resistance (4.9.3, 5.4, 5.5, 5.6, 5.9) The licensee will provide the results of a standard ASTM E-119 test to demonstrate the adequacy of fire resistance of the Calvert Cliffs elec-trical penetrations.

Response

On March 7,1980,' the Southwest Research Institute performed an " ASTM E-119 test" in accordance with BGCE specifications. Copies of the Southwest Resear.ch Report containing the results of the tests are being submitted ta the NRC staff for their review and comments. NRC staff and consultants witnessed the fire tests. 3.2.7 Piping Penetration Fire Resistance (4.9.4, 5.4, 5.5, 5.6, 5.9) The licensee will. provide the results of a standard ASTM E-119 test to de-monstrate that piping penetrations have fire resistance racings coumensu-rate with fire hasards on both sides of the barriers.

Response

Refer to Item 3.2.6 " Response". 3.2.8 Radiological Consequences of Fire (4.14, 5.3, 5.7, 5.9, 5.20, 5.24, 5.25) The licensee will provide the results of a study of radiological consequen-ces of a fire in areas containing radioactive materials (including a fire in a charcoal or a HEPA filter), or other areas where a fire could cause the release of radioactive materials. Additional modifications will be provided in areas where a fire could cause the release of radioactive materials that could preclude the normal usage or occupancy of areas sur-rounding the plant.

Response

Submitted December 21, 1979. 3.2.9 Effects of Fire on Radiation Monitors The licensee will provide the results of a study to demonstrate that the radiation monitor will remain operational when exposed to smoke and/or heat of a potential fire.

Response

Su ted December 21, 1979. Revised: 5/20/80

.,.3.3.6 Roo.a No. 9 ascription 698 Aux. Bldg. 512 Control Rm. HVAC Equip. Rs. 520 Spent Fuel Pool Area Vent Re. 524 Main Plant Exhaust Rm. Unit 1 526 " Unit 2 522 Hot Laboratory Rad Chem. 529 Elect. Equip. Rm. Unit 1 532 " Unit 2 530 Cask Handling Area 12' Turkine Bldg. 4 603 Auxiliary Feed Pump Rs. Unit 1 605 Unit 2 Intake Structure 1101 Warehouse Storage Area 602 Auxiliary Steam Gen. Rs. 3.3.7 Quality Assurance (6.2) The licensee has not provided the comparison of his quality assurance program sad the guidelines.

Response

A Fire Protection Quality Assurance Procedure (QAP-9) has been pre- . pared. A comparison of QAP-9 and NRC guidelines was submitted December 31, 1980. Revised: 5/20/80 ,._.s_

FHA-3 s foot make t'is an acceptable method of extinguishment in this case. Prior to ext.aguishment of either high or low flash point liquids, the cooling action of the sprinkler system provides significant pro-tection of safe shutdown equipment from heat. In conclusion, the high reliability of automatic sprinklers combined with tt. sir capa-bility of extinguishing both high flash point combustible liquids and water soluble flammable liquids provides adequate assurance that both divisions of safe shutdown related equii ment will remain undamaged following an exposure fire and one division will remain undamaged fol-lowing a fire originating in the other division. Criteria 2 The addition of fire rated doors is not necessary for rooms where a wet pipe sprinkler system is employed at one side of the doorway. Where credit is taken for automatic sprinklers in lieu of fire doors, at least one sprinkler head will be located adjacent to and immediately above the doorway to provide a water curtain to prevent extension of fi re. Criteria 3 In rooms where cable trays would obstruct distribution from ceiling sprinklers, sprinklers will be located below the cable trays to sup-press transient fire hazards. In addition, automatic smoke detectors will be provided at the ceiling above the cable trays to detect inter-nally initiated fires in trays which have been demonstrated by Sandia Laboratories Test Report " Cable Tray Fire Tests", SAND 77-1125C, July, 1977, to be slow propagating and would allow fire brigade response as discussed in Category B. Criteria 4 For rooms which are analyzed as requiring an automatic suppression system but which would be subjected to a greater potential hazard from inadvertant actuation of a sprinkler system, an automatically actuated, total flooding HALON 1301 system shall be installed to sup-press a fire prior to damage of either redundant division unless the fire originates in one division. In that case, the HALON 1301 system will prevent damage to the redundant division. Criteria 5 Sprinklers placed at the ceiling of a room in combination with the appropriate water flow alaras provide the required fire detection. Criteria 6 Rooms containing redundant safe shutdown electrical raceway, not pro-tected by ceiling mounted sprinklers, HALON 1301 total flooding systems, or adequate physical separation shall require one of the two redundant raceways to be wrapped in a rated fire resistive material. The fire rated materials will provide 3 hour protection for conduits and 55 minutes for cable trays to allow fire brigade response. This Criteria is currently under investigation due to possibly unresolved safety ques-tions relating to heat generated within encapsulated trt,s and conduit. Revised: 5/20/80

TABLE 1 PAGE 1 0F 12 PROPOSED PLANT MODIFICATIONS FOR FIRE PROTECTION UPGRADE HOOM NO. FIRE DETECTION FIRE SUPPRESSION OTiiER nGDIFICATIONS 100/103/116 None Sprinklers at Ceiling 1., Place sprinklers to cover entire floor area. l 101/119 Nona Sprinklers at Ceiling 1. None 2. Add fire damper to ceiling and wall !!VAC duct penetration. 3. Close blockouts between Room 118 and 119 and 101 and 102 with fire rated 3 hour stop. 4. Provide interlock to close motor operated l!VAC dampers at ceiling and wall on actuation of smoke detectors. 5. Close blockouts between Room 118, 119, 101, and 102 and the Corridors 100 and 103, i 102/118 Smoke Detection Nonc 1. Same as 101/119. at Ceiling 103/116 See Hoom No. 100 104 Smoke Detection None None at Ceiling Hevised: 1/11/d0 5/20/80

PAGE 2 0F 12 ROOM NO. FIRE DETECTION FIRE SUPPRESSION OTHER MODIFICATIONS 105/115 None Sprinklers at Ceiling 1. Provide curbs at entrance and between compartments. 2. Add fire damper in HVAC duct communicating with Hoom 106/113. 106/113 None Sprinklers at Ceiling None 107/114 Smoke Detection None None at Ceiling 108 Smoke Detection None None at Ceiling 109/112 None None None 110 Smoke Detection None None at Ceiling 111 Smoke Detection None None at Ceiling 113 See Room No. 106 Sprinklers at Ceiling Nonc j Hevised: 1/11/d0 5/20/80 i = l l

PAGE 3 0F 12 ROOM NO. FIRE DETECTION FIRE SUPPRESSION OTHER MODIFICATIONS 117 None None Nonc 120/122 Smoke Detection None None at Ceiling 121/123 None None None 200 None Sprinklers at Ceiling None 201/228 None Sprinklers at Ceiling 1. Curb around each CCW pump foundation. 2. Upgrade unrated penetration to Room 225/204. 202 None Sprinklers at Ceiling 1. Provide spray shields at NCC's. j 203/224 None Sprinklers East of None R Line g Revised: 5/20/80 G

PAGE 4 Of 12 ROOM NO. FIRE DETECTION FIRE SUPPRESSION OTi!ER MODIFICATIONS i 204/225 None Sprinklers at Ceiling None i 205/226 None Sprinklers at Ceiling None 206/227 Smoke Detection None None at Ceiling 207 None None None 208 None None None 209 None Sprinklers at Ceiling None 210 None Sprinklers at Ceiling None itevised: 1/11/d0 S/20/80 W

PAGE 5 0F 12 ItOOM No. FIltE DETECTION FIRE SUPPRESSION OTiiER NODIFICATIONS 212/219 Ncne Sprinklers at Ceiling None 213/220 None None None 214/218 Smoke Detection None 1. Close all blockouts between 220 and at Ceiling 218 and 214 and 213. 215/217 None Sprinklers at Ceiling None 216/216A None Sprinklers at Ceiling None 218 See Room No. 214 221E326/ Smoke Detection None None 211C321 at Ceiling 222 None Sprinklers at Ceiling Nonc i Revised: 1/11/d0 5/20/a0 O

PAGE G OF 12 ROOM NO. FIHE DETECTION FIRE SUPPRESSION OTilEH MODIFICATIONS 223 None Sprinklers at Ceiling None 229/230 Flame Detection Nonc 1. Wrap redundant raceways. 2. Provide an RCP oil collection system. lA/lB/2A/2B Smoke Detection Automatic Sprinklers None at Ceiling (existing) 301/304/305/307 None None None 302/306/[C/2C Smoke Detection llalon 1301 1. Interlock llalon with IIVAC. at Ceiling total flooding 2. Actuation of Italon by detectors. 3. Electrically supervise all doors. 308 None None None 309/315 None Sprinklers at Ceiling None Revised: 1/11/d0 0

PAGE 7 0F 12 ROOM NO. FIRE DETECTION FIRE SUPPitESSION OTi!ER MODIFICATIONS 310/316 None Sprinklers at Ceiling None l 311/317 Smoke Detection None 1. Wrap two divisions of shutdown cable, at Ceiling 2. Add fire damper in IIVAC duct in the ceiling. (existing) 3. Upgrade unrated blockouts to 3 hour. 312/318 Smoke Detection None None at Ceiling 313/411/ None None None 314/427 319/325 Smoke Detection None No n'- at Ceiling 320 Smoke Detection None None at Ceiling 322/324 Smoke Detection None None ~ at Ceiling l I 4 Itevised: 1/11/d0 5/20/d0 1 e

PAGE 8 OF 12 H00M NO. FIRE DETECTION fille SUPPRESSION OTilER MODIFICATIONS 323 Smoke Detection None None at ceiling of Passage Area 325 Smoke Detection None None 327/328 None None None (See Itesponse to SElt Item 3.1.18.) 400/401/402/ Smoke Detection None None _403/404/405/ (Existing) 415/432/434/ 435/436/437/ 438 406 Smoke Detection lialon 1301 None (Existing) (Existing) 407/430 Smoke Detection Nonc 1. Wrap the redundcnt division of raceway. at Ceiling (Existing) 408 None Sprinklers at Ceiling None itevised: 1/11/60 5/20/80 O

i PAGE 9 0F 12 ROGM No. FIRE DETECTION TIRE SUPPRESSION OTilEli MODIFICATIONS 409/429 Smoke Detection Sprinklers at Ceiling None .l at Ceiling (Existing) 410 None None None l' 412 None None None 414/423 Smoke Detection Sprinklers at Ceiling 1. Provide spray shields at MCC's. l. at Ceiling (Existing) 416/421/422 Smoke Detection Preaction Sprinklers None at Ceiling at Ceiling (Existing) (Existing) 417/418 None Sprinklers at Ceiling None (Existing) 419/425/426 None' Sprinklers at Ceiling None l, Itevised: 1/11/80 5/20/80 O b

PAGE 10 OF 12 ROOM Nt FIRE DETECTIO.i FIH6 LOPPRESSION OTHER MODIFICATIONS 420 None Sprinklers Protect Shut-Nonc down cable Trays 424/413 None None None l 428 None Sprinklers at Ceiling None 431 Smoke Detection in Halon 1301 (existing) None l-Room and Sub-floor (Existing) 439/440 Smoke Detection None, None at Ceiling 441 None None None U-1/U-2 Smoke Detection None None at Ceiling (Existing) Revised: 5/20/d0

100-1 ROOM NO. 100 FIGURE 1 ROCM DESCRIPTION Passage This room does not contain safety related equipment. It contains the following equipment and cables: 1. Three redundant divisions of safe shutdown cable per tsiit. 2. Two divisions per unit of safety related cable. l PROPOSED MODIFICATIONS 1. A wet pipe sprinkler system will be provided above the cable trays l as required by Category A, Criteria 1 and for protection of doors i and penetrations into the ECCS pump room nos. 101, 102, 118, and 119 by Criteria 2. 2. Smoke detectors are not reoui1*d per Criteria 5. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Separation of this room from other areas will be assured by the addi-tion of a sprinkler system, Modification 1 above, in lieu of fire doors as discussed in Criteria 2. Additional assurance is afforded by modifications and/or existing barriers in the following rooms: Passage - 103 - addition of a sprinkler system. a. b. ECCS Rooms - 118, 102, 119, 101 - addition of fire dampers. Identify the minimum separation between the redundant cables (in trays 2. or in conduits)/ equipment required for safe shutdown in each fire area.

Response

The addition of sprinklers at the ceiline as per Criteria 1 will l accomplish effective sepa* cation between redundant safe shutdown

cables, i

i Revised: 5/20/80

100-2 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

Based on the original Fire Protection Program Evaluation, the fixed fire loading in the corridor would result in a maximum 6 minute fire duration.. The Case 1 transient combustible would add an additional 7 minutes to this loading. The Case 2 transient combustible results in a lower fire loading. 4.. Identify the worst damage that could result from such fire. ~

Response

Due to the proposed modification to add a wet pipe sprinkler system at the ceiling, the postulated fire would be effectively suppressed before either divisions could become involved unless the fire origi-nated within one division then the sprinkler system would prevent involvement of the redundant division. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

The proposed wet pipe sprinkler system will protect safe shutdown equipment from exposure to transient fires and will prevent fires originating within a specific division from affecting the redundant division. Thus, the safe shutdown capability will not be threatened. Radiological consequences are discussed in the response to SER Item 3.2.8. EVALUATION OF SER SECTION 5 MODIFICATIONS. Refer to Section 5.1.6 of the SER. 1. Replace al1 unrated doors in these areas by UL or FM listed fire _ doors of a fire waistance rating commensurate with fire hazards on both sides of the barrier, or provide acceptable alternate protection. Revised: 5/20/80 f

100-3

Response

s The doors presently located in this area are watertight doors. In lieu of rating fire doors, which are unobtainable for watertight doors, sprinklers will be provided as discussed in Criteria 2. This system will also provide coverage in the corridor alcoves near the doors. 2. Install fire detectors in each pump room and in the corridor areas.

Response

The automatic wet pipe sprinkler system will provide remote annunciation of an alarm whenever sprinkler system actuation occurs in accordance with Criteria 5. 3. Separate, by additional barriers or by rerouting, redundant cables required for safe shutdown, or demonstrate the adequacy of cable separation in preserving safe shutdown.

Response

See response to SER Questions 4 and 5 aboh'e. g i ) Revised: 5/20/80

l 101-1 ROOM NOS. 101 & 119 - FIGURE 1 ROOM DESCRIPTION ECCS Pump Rooms Unit 1 - 119 Unit 2 - 101 This room contains two divisions of safety related equipment and associated cable and two divisions of safe shutdown cable in addition to the following safe shutdown equipment and associated cabling: 1. Low pressure safety injection pump 11 (21) 2. Shutdown cooling heat exchanger compoment cooling outlet valve 1(2)-CV-3828 3. Low pressure safety injection to the shutdown heat exchanger valve 1(2)-MOV-658 PROPOSED MODIFICATIONS i 1. An automatic wet pipe sprinkler system will be installed in Corridor 100 in lieu of a fire rated door in accordance with criteria 2. 2. Caoke detectors will be provided as described by Category B. Detectors will also serve to initiate closure of unrated ventilation dampers for smoke control. 3. To provide complete compartmentalization, 3 hour rated fire dampers will be installed in the ventilation ducts penetrating the ceiling and the wall to Corridor 100 4. An automatic wet pipe sprinkler system will be installed at the ceiling in accordance with criteria 1. ~ 5. To provide consistency in the fire rating of room boundaries, the elec-trical and piping penetrations between rooms 101 and 102 (135 and 118) will be upgraded to 3 hour ratings. Penetrations to Corridor 100 will be similarly upgraded to 3 hour ratings. ,SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetra-tions) of appropriate fire resistance. l

Response

1 ) Separation between adjacent areas is accomplished by the addition of a l sprinkler system, Modifications _1_ and 4, in lieu of fire doors as dis-l cussed in Criteria 2 and by Modifications 3 and 5. Revised: 5/20/80

o 101-2 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

Based on the existing arrangement of redundant equipmeLc being in sepa-rate rooms, with Modifications 1, 3, A and 5 proposed, area separation I is accomplished. Modification 4 indicates that, in lieu of physical separation _ automatic wet pipe sprinklers will provide an adeouate marcin of safety as per criteria 1. These are the only redundant safe shutdown- - circuits in the room. 3. Identify the largest fire that can be expected in each fire area based - on the fixed combustibles in the area and transient combustibles which may be introduced into or moved through the area. ~ - " ' l

Response

Per the original Fire Protection Program Evaluation, the fixed fire loading in the area would result in a fire of 2 minute duration. The case 1 transient combustible would add an additional 3 minutes to this loading. The case 2 transient combustible results in a lower fire loading. 4. Identify t!.e worst damage that could result from such fire. t Responsv A postulated fire which starts internally to MOV-658 may affect the { valve operator. In addition, one division of either division of ZA i or 2C cable may be affected. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive relemae to the environment.

Response

Safe shutdown capability will not be threatened since the proposed wet pipe sprinkler system will protect safe shutdown equipment from exposure division from affecting the redundant division.to transient fires and will pre i Radiological conse-quences are discussed in the response to SER Section 3.2.8. j EVALUATION OF SER SECTION 5 NODIFICATIONS = 1 Refer to Section 5.1.6 of the SER. 1. Replace all unrated doors in these areas by UL for FM listed fire doors of a fire resistance rating commensurate with fire hazards on both sides of the barrier, or provide acceptable alternate protection. l Resnonse An automatic wet pipe sprinkler system at the ceiling will be provided l in lieu of fire doors to prevent the spread of fire from one area to another as discussed in Criteria 2. Additionally, the openings to Revised: 5/20/80 l ~,.

101-3 Corridor 100 are presently protected by watertight doors required to prevent flooding of the rooms. These doors alone would be adequate to withstand the fires postulated and described in SER Item 3 response above (i.e., fires of 2 and 3 minute duration). 2. Install fire detectors in each pump room and in the Corridors.

Response

Sprinkler syste:a water flow alarms provide the required fire detec-tion as listed in Criteria 5. 3. Separate, by additional barriers or by rerouting, redundant cables required for safe shutdown, or demonstrate the adequacy of cable separation in preserving safe shutdown.

Response

Cables to charging pumps 11 (21) and 13 (23) are the only redundant safe shutdown cables in this room. As discussed in Category A, Criteria 1, the proposed modification to install automatic sprinklers will prevent the loss of either division unless the fire originates in one division, in which case the sprinklers will protect the redun-dant division. 1 l l Revised: 5/20/80

b i 103-1 I ROOM NOS. 103 AND 116 - FIGURE 1 I ROOM DESCRIPTION Units 1 and 2 - 103 - Passage j l Unit 1 - 116 - Elevator Lobby ) These rooms do not contain safety related equipment. They contain the following equipment and cables: - _l. Two divisions of safe shutdown equipment per unit. 2. Three redundant divisions of safe shutdown cable per unit. 3. Two divisions per unit of safety related cable. PROPOSED MODIFICATIONS l 1. A wet pipe sprinkler system will be provided abeye the cable trays -i as required by Category A, Criteria _1 and for protection of doors j and penetrations into the ECCS pump room nos. 101, 102, 118, and i 119 as discussed in Criteria 2. Room 116 is an empty vestibule, I containing no equipment or cabling and altough open to area 103, will not be sprinklered. l 2. Smoke detectors are not required per Criteria 5. l '~ I SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Separation of this room from other areas will be assured by the additionoof a sprinkler system, Modification 1 above, in lieu of fire doors as discussed in Criteria 2. Additional assurance is afforded by modifications and/or existing barriers in the following rooms: Charging Pump Rooms - 115 and 105 - addition of sprinkler systems. a. b. Passage - 100 - addition of a sprinkler system. c. Machine Room - 117 - fire rated door. l Revised: 5/20/80 i

/ 103-2 ) 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area. l

Response

The addition of sprinklers at the ceiling as per criteria 1 will accomplish effective separation between redundant safe shutdown l cables. Two sets of redundant pressure controllers, for each unit, are required for safe shutdown and sprinkler coverage will be provided in lieu of separation as discussed i.n Category A, i Criterial -j 3. Identify.the largest fire that can be expected in each fire area ~, based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

Based on the original Fire Protection Program Evaluation, the fixed fire loading in the corridor would result in a maximum 6 minute fire duration. The Case 1 transient combustible would add an addi-tional 7 minutes to this loading. The case 2 transient combustible results in a lower fire loading. 4. Identify the worst damage that could result from suh fire. Responae Due to the proposed modifications, including the wet pipe oprinkler system at the ceiling, the postulated fire would be effectively suppressed before either division would become involved unless the fire originates within one division, in which case the suppression system will protect the redundant division. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

Due to the proposed modification to add a wet pipe sprinkler system, the postulated fire would be effectively suppressed before either division could become involved unless the fire were to originate in one division, then the fire suppression system would prevent involve-ment ofiits redundant division. Thus, the safe shutdown capability will not be threatened. Radiological consequences are discussed in the response to SER Item 3.2.8. Revised: 5/20/80

e- = 103-3 EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.1.6 of the SER. The licensee will: 1. Replace all unrated doors in these areas by UL or FM listed fire doors.of a fire resistance rating commensurate with fire hazards on both sides of the barrier, or provide acceptable alternate protection.

Response

The doors presently located in this area are watertight doors. In '2'~ lieu of rated fire doors, which are unobtainable for watertight doors, sprinklers will be provided as discussed in Criteria 2. 2. Install fire detectors in each pump room and in the corridor areas.

Response

~ The proposed sprinkler system' with its water flow alarms will provide. the requirea rire detection as stated in Criteria 5 (for the pump _.._ room see responses for rooms 101, 102, lla, 119, 120, and 122). 3. Separate, by additional barriers or by rerouting, redundant cables required for safe shutdown, or demonstrate the adequacy of cable aeparation in preserving safe shutdown.

Response

See response to SER Questions 4 and 5 above. Revised: 5/20/80

104-1 l l ROOM NO. 104 - FIGURE 1 ROOM DESCRIPTION Passage Units 1 & 2 - 104W and 104E In room 104 there is one division of Unit 1 safe shutdown cable and one division per unit of safety related cable. The entire room does not contain safe shutdown or safety related equipment. PROPOSED MODIFICATIONS 1. A smoke detection system will be installed in the passage 104 in accordance with Category B. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Separation from safe shutdown areas of the plant will be accomplished by the addition of sprinkler systems in adjacent rooms in 1,ieu of fire doors' as discussed in Criteria 2. (Also see response for rooms 103, 105, 115.) Identify the minimum separation between the redundant cables (in trays 2. or in conduits)/ equipment required for safe shutdown in each fire area.

Response

This room contains only one division of Unit 1 safe shutdown equipment required for safe shutdown. 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combustibles which may be introduced into or moved through the area.

Response

Based on the original Fire Protection Program Evaluation, the fixed fire loading in the room would result in a maximum 6 minute fire dura-tion. The case 1 transient combustible would add an additional 7 minutes to this loading. The Case 2 transient combustible results in a lower fire loading. Revised: 5/20/80

104-2 4. Identify the worst damage that could result from such fire.

Response

ZC cabling for Charging Pump 13 could be damaged. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

Safe shutdown capability would not be affected since cabling for redundant charging pumps is routed through other areas. Radiological ~ consequences are discussed in response to SER Item 3.2.8. EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.3.6 of the SER. The licensee will: 1. Analyze the radiological consequences of fire damage to the waste pro-cessing system cables.

Response

Refer to the response to SER Section 3.2.8. 2. Analyze the effects on safe shutdown of the loss of auxiliary feed-water pump room fans and/or heating of the boric acid system.

Response

4 Not applicable to this room. 3. Install fire detectors in coolant receiver tank rooms (areas 107 and 114), the cc. eidor (area 104), and other areas containing safety related cablos/ components.

Response

Fire detection will be added to this room. Revised: 5/20/80

200-1 ROOM NO. 200 - FIGURES 2 AND 6 ROOM DESCRIPTION E-W Corridor Elevation 5'-0" This area contains two divisions of safety related cable and two divi-sions per unit of safe shutdown cable (no safety related or safe shut-down equipment). PROPOSED MODIFICATIONS 1. An automatic wet pipe sprinkler system will be installed above cable trays in accordance with Category A, Criteria _12 SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Separation between adjacent areas is accomplished by the addition of a sprinkler system in lieu of fire doors as described in Criteria 2. 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

Sprinklers above cable trays and equipment will be provided in lieu of additional physical separation of equipment / cabling into separate fire areas as discussed in Category A and Criteria 1. 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combustibles which may be introduced into or moved through the area.

Response

The Fire Protection Program Evaluation demonstrated a fixed fire load-ing of approximately 5 minutes for this area. An additional 9 minutes loading would result from a Case 1 transient. Revised: 5/20/80

200-2 4. Identify the worst damage that could result from such fire.

Response

Due to the proposed modification to add a wet pipe sprinkler system I l the postulated transient fire would be effectively suppressed before either divisions of safe shutdown heat tracing could become involved 4 unless the fire originates within one division, then the suppression system would prevent involvement of its redundant division. l 5. Demonstrate than such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment. ~

Response

Safe shutdown capability is not threatened since the proposed wet pipe sprinkler system will protect safe shutdown equipment from exposure to transient fires and will prevent fires originating within a specific division from affecting the redundant division. Radiological consequences are discussed in the response to SER Section 3.2.8. EVALUATION OF SER SECTION 5 MODIFICATIONS 'I Refer to Section 5.4.6 of the SER. The licensee will: 1. Separate each pump room from other plant areas by upgrading the fire resistance of doorway openings, and electrical cable, ventilation duct and piping penetrations in the barriers to a rating commensurate with fire hazards on both sides of the barrier, or provide an acceptable alternate.

Response

An automatic wet pipe sprinkler system will be installed in lieu of fire doors to prevent the spread of fire from one area to another as dis-cussed in Criteria 2. 2. Demonstrate, or, provide appropriate modifications to assure, the com-ponent cooling capability can be preserved in the event of a fire in r the area.

Response

Refer to responses for rooms 201 and 228. 3. Install fire detectors in each room and in the corridor. {

Response

The proposed ap ler system with its water flow alarms will pro-vide required fire detection as stated in Criteria 5. Refer to responses for rooms 201 and 228. Revised: 5/20/80 t

i I 200-3 1 4. Install an excess flow stop valve in the hydrogen line to auto-matically secure hydrogen in the event of a piping system rupture.

Response

An excess flow stop valve will be installed. Refer to response to Section 3.1.14. 5. Separate at least one division of cables associated with systems ~ identified in Section 5.4.1 from their redundant counterparts and the hazards in the area by fire rated barrier enclosures, or demon-strate the.. adequacy of cable separation in preserving safe shutdown.,

Response

~'~ See response to SER Questions 4 and 5 above. Revised: 5/20/80

202-1 ROOM NO. 202 - FIGURES 2 AND 6 300M DESCRIPTION Eastern Most N-S Passage This room contains two divisions of safety related cable and two

divisions of safe shutdown cable per unit (no safety related or safe shutdown equipment).

~ PROPOSED MODIFICATIONS ~ 1. An automatic wet pipe sprinkler system will be installed above l the cable trays (continuation of Room 200 system) per Category A, Criteria,1; -h h SER QUESTIONS l. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance. 1

Response

l The wall between Hot Machine Shop Room 223 and the Passage is 3 hour rated. The walls between the Passage and Component Cooling Rooms 201 and 228 are protected by sprinklers in those rooms. There is a sprinkler system installed at each end of the passage in Rooms 203 and 224 and another in Corridor 200 which covers the intersection between the passage and the corridor. 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each j fire area.

Response

Sprinklers installed at the ceiling will assure that cable separa-tion is adequate and prevent damage to redundant cables. In addi-tion, redundant cabling is separated by 25 feet horizontally. Revised: 5/20/80

202-2 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient com-bustibles which may be introduced into or moved through the' area.

Response

The Fire Protection Program Evaluation determined that there is a fixed fire loading of approximately 13 minutes. The Case 1 tran-sient adds 6 minutes to this load. 4. Identify the worst damage that could result from such fire.

Response

~2' The worst damage that could occur would be the involvement of one channel of safe shutdown cable. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

Due to the proposed modificatica to add a wet pipe sprinkler system, the postulated fire would be effectively suppressed before either division could become involved unless the fire were to originate in i one division, then the fire sup ment of its redundant division.pression system would prevent involve-EVALUATIONS OF SER SECTION 5 MODIFICATIONS l No modifications were required. l l l Revised: 5/20/80

4. 203-1 1 ROOM NOS. 203 AND 224 - FIGURES 2 AND 6 ROOM DESCRIPTION Piping Areas Unit 1 - 224 Unit 2 - 203 i These rooms contain two divisions of safety related equipment / cable and one division of safe shutdown cable (no safe shutdown equipment). PROPOSED MODIFICATION l 1. An automatic wet pipe sprinkler system will be installed east of j column line,R per Criteria 1 and 2. l SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas i that are not separated by fire barriers (with protected openings i and penetrations) of appropriate fire resistance.

Response

Spatial separation, barrier walls, and the added sprinkler system ) will provide adequate separation between this and adjacent safe ] shutdown areas per Criteria 2. 1 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

j This room contains only one division of safe shutdown cabling and no equipment is required for safe shutdown. 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

The original Fire Protection Program Evaluation lists the fixed fire loading at approximately 12 minutes. The case 1 transient combustible would add another 3.3 minutes exposure. Case 2 transient would result in a lower fire loading. Revised: 5/20/80 l

204-1 ROOM NOS. 204 AND 225 - FIGURES 2 AND 6 ROOM DESCRIPTION Radiation Exhaust Vent Equipment Room Unit 1 - Room 225 ~ Unit 2 - Room 204 These rooms _contain three divisions of safety related equipment / cable ~- and three divisions of safe shutdown cable (no safe shutdown equipment). o PROPOSED MODIFICATIONS ~ 1. An automatic wet pipe sprinkler system will be added above cable trays per Category A and Criteria l SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Separation of this room will be assured by the addition of a sprinkler system as discussed in Criteria 2. Fire dampers in duct work provide separation from adjacent areas. Identify the minimum separation between the redundant cables (in trays 2. or in conduits)/ equipment required for safe shutdown in each fire area.

Response

~ The addition of sprink1ers at the ceiling will accomplish effective - separation between redundant sare shutoown cables. There is no safe shutdown equipment in this area. Revised: 5/20/80

204-2 3. Identify the largest fire that can be expected in each fire area ) based on the fixed combustibles in the area and transient combus-j tibles which may be introduced into or moved through the area. Resoonse The Fire Protection Program Evaluation listed a 17 minute fixed fire load for this area. The case 1 transient would increase this exposure by 4 minutes. 4. Identify the worst damage that could result from such fire.

Response

Due to the proposed modification to add a wet pipe sprinkl' r system, e the postulated fire would be effectively suppressed before either division could become involved unless the fire originated within one division, then the suppression system would prevent involvement of the redundant division. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

The wet pipe sprinkler system will suppress a fire in this room as demonstrated in Category A, Criteria 1 and discussed in responses to SER Questions 2 and 4 above. Therefore, the ability to achieve safe shutdown is assured. Radiological consequences are discussed in the response to SER Item 3.2.8. EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.7.6 of the SER. The licensee will: 1. Install fire detectors in this area.

Response

Smoke detcetors will be installed at the ceiling as per Criteria 3. Replace the existing unrated doors by UL or FM listed, 3 hour fire 2. doors, or &cceptable alternate protection.

Response

Automatic sprinklers will be installed in lieu of fire rated doors as discussed in criteria 2. Revised: 5/20/80

204-3 3. Separate one division of safety related cables from their redun-dant counterparts by rated fire barriers, or reroute one division of cables out of the area, or demonstrate the adequacy of cable ~ separation in preserving safe shutdown.

Response

See responses.to SER Questions 4 and 5 above. 4. Provide the results of an analysis for the radiological conse-quences of a charcoal fire.

• 22:3 T;'

Response

Refer to response to SER Section 3.2.8. Revised: 5/20/80

e O 209-1 ROOM NO. 209 - FIGURE 6 ROOM DESCRIPTION Equipment Hatch Area Units 1 and 2 - 209 This room does not contain safety related or safe shutdown equipment or cable. PROPOSED MODIFICATIONS An automatic wet pipe sprinkler system will be installed in accordance with Criteria 1. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Room 209 is enclosed by a minimum 3 hour fire barrier, with the exception of the open doorways to rooms 203, 208, and 210. Room 203 contains safe shutdown cable. The doorway to room 203 and 210 are open; 'however, rooms 203 and 210 are to be provided with sprinklers. Separation between adjacent areas is accomplished by the addition of sprinklers in lieu of fire doors as discussed in Criteria 2. Rooms 208 and 210 do not contain safe shutdown equipment or cable. A fire originating in room 209 would not endanger safe shutdown. 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

This room does not contain redundant equipment or cables required for safe shutdown. 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

The fixed fire loading is approximately 1 minute. A Case 1 tran-sient fire would have a duration of 7 minutes. The Case 2 tran-sient combustible would result in a lower fire loading. Revised: 5/20/80 e--

209-2 4. Identify the worst damage that could result from such fire.

Response

There is no safety related or safe shutdown equipment or cable located in this room so a fire would have no effect on the ability to safely shutdown the plant. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

Automatic sprinkler s stems are to be provided. There is no safe shutdown equipment or cable located in this room. Therefore, a fire would have no effect on safe shutdown. EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.9.6 of the SER. The licensee will (only statement 5 applies to this room): 5. Analyze the radiological consequences of a fire in the waste gas area.

Response

This is addressed in the response to SER Item 3.2.8. Revised: 5/20/80

210-1 'w I ROOM NO. 210 - FIGURE 6 ROOM DESCRIPTION Decontamination Room Units 1 and 2 - 210 This room contains one division per unit of safety related cable. This room does not contain safety related equipment, or safe shutdown equip-ment or cable. PROPOSED MODIFICATIONS This room will be provided with an automatic sprinkler system in accor-dance with criteria 1 as it is postulated that a case 1 transient fire could be introduced to the room. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

This room is enclosed by a minimum 3 hour fire barrier, except for the open doorways to rooms 200 and 209. Room 200 contains safe shut-down cabling. Room 200 and 209 are to have sprinklers installed. Separation between adjacent areas is accomplished by the addition of sprinklers in lieu of fire doors as discussed in criteria 2. Room 209 does not contain safe shutdown equipment or cable. A fire originating in room 210 will not endanger safe shutdown. 2. Identify the minimum separation between the redundant cables (in-trays or in conduits)/ equipment required for safe shutdown in each fire area. i

Response

This room does not contain redundant equipment or cables required for safe shutdown. 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

The fixed fire loading is approximately 1 minute. A Case 1 tran-sient fire would have a duration of 7 minutes. The Case 2 tran-sient combustible would result in a lower fire loading. Revised: 5/20/80 w

210-2 's 4. Identify the worst damage that could result from such fire.

Response

There is no safe shutdown equipment or cable located in this room so a fire would have no effect on the ability to safely shutdown the plant. There is only one division of safety related cable in this room, so another division will be available. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

The installation of an automatic sprinkler system will assure prompt suppression of fire. There is no safe shutdown equipment or cable located in this room. Therefore, a fire would have no effect on safe shutdown. EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.9.6 of the SER. The licensee will (only statement 5 applies to this room): 5. Analyze the radiological consequences of a fire in the waste gas area.

Response

This is addressed in the response to SER Item 3.2.8. i Revised: 5/20/80 m

212-1 ROOM NOS. 212 AND 219 - FIGURES 2 AND 6 ROOM DESCRIPTION Western most N-S Passage and Vestibule Room 212 - Passage Room 219 - Elevator Vestibule These rooms contain two divisions of safety related cable / equipment and two divisions of safe shutdown cable and the following safe shutdown equipment: 1. Refueling Water Tank Outlet Valve MOV-504. PROPOSED MODIFICATIONS 1. An automatic wet pipe sprinkler system will be added above cable trays per Category A and Criteria _1 and 2. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

Adjacent rooms will be separated from this area by the added sprinkler system in lieu of fire doors per Criteria 2. This system will also serve at either end of the Corridor. 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

The addition of sprinklers at the ceiling will accomplish effective l separation between redundant safe shutdown cables as discussed in Category A, Criteria 1. l i Revised: 5/20/80 f

i 212-2 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

_ _ Per the Fire Protection Program Evaluation, the fixed fire loading 1 is approxima'tely 13 minutes. A Case 1 transient would add another 6 minutes loading. 4. Identify the worst damage that could result from such fire.

Response

~ Due to the proposed modification to add a wet pipe sprinkler system, E the postulated fire would be effectively suppressed before either division could become involved unless the fire originated in one division,. then the suppression system would prevent involvement of. the redundant division. A postulated fire which starts internally to motor operated refueling water tank outlet valve MOV-504, may affect the valve operator but the valve, which need not be operated for several hours, could be operated manually after suppression of the fire as required by plant operating conditions. _.I 5. Demonstrate _that such damage will not have an adverse effect on safe-shutdown or cause excessive radioactive release to the environment. Resconse Based on (2.) and (4.) above, a fire in this area will have no adverse effect on safe shutdown. EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.8.6 of the SER. The licensee will: 1. Install fire detectors in the corridor (including passage) and boric i acid and tank rooms. i h

Response

{ The addition of a wet pipe sprinkler system will provide for fire l ~ ~ ~ ~ ~detectioE as stated in Criteria 5. { 2. Demonstrate the adequacy of separation of redundant cables, from { each other and from possible exposure fire hazards, or provide appropriate modifications to preserve such.

Response

i l Refer to the responses to SER Questions 4 and 5. ) i l i Revised: 5/20/80 _d

310-1 ROOM NOS. 310 AND 316 - FIGURES 3 AND 7 ROOM DESCRIPTION Piping Penetration Rooms Unit 1 - 316 ~ Unit 2 - 310 ~ These. rooms contain two divisions of safety related equipment / cable [7 't and the following safe shutdown equipment and associated cabling con ~7 sisting of auxiliary feedwater flow control valves 1(2)-CV-4511 and 1(2)-CV-4512 and their respective controllers. - ~~ PROPOSED MODIFICATIONS 1. A wet pipe sprinkler system will be installed in accordance with Category A, Criteria 1 in the vicinity of safe shutdown equipment and cable. 2. Smoke detectors will be added at the ceiling. SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

In lieu of a fire rated door, proposed sprinklers, plus sprinklers in ~ aiiacent room 315 (309), will be installed to insure adequate separa-tion at the watertight door to this room in accordance with criteria 2. The door to the purge air supply room 318 (312) is a class B door which is adequate considering the low fire load as given below in the response l to SER Question 3. and in the write-up for room 318. The floor is steel grating. Separation of rooms 316 (206) are not required to be separated as safe shutdown equipment in these areas are not redundant to one another. Any transient combustible which is spilled will flow to the~ -- C room below where protection will be provided. All penetrations seals- ~ ~ ^^ l are fire rated. N Identify the minimum separation between the redundant cable (in 2. trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

Sprinklers above cable trays and eiguipment will be provided in lieu of ' additional physical separation as discussed in Category A, criteria 1. ) i l l i Revised: 5/20/80 7 3 -._

310-2 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

The Fire Protection Program Evaluation demonstrated that the ~ maximum fixed fire load would be approximately 2 minutes. The worst loading would result from a Case 2 transient. 4. Identify the worst damage that could result from such fire.

Response

One division of safe shutdown equipment and cabling could be damaged. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

- ~ ~ The wet pipe sprinkler system will suppress a fire in proximity to ____. safe shutdown equipment and caole. IP-4511 and TP-4512 controllers are encapsulated in high temperature energy resistant enclosures and would not be effected by fire. The CV's will, if affected by fire, fail in a position advantageous to safe shutdown. Therefore, the ability to achieve safe shutdown is assured. EVALUATION OF SER SECTION 5 MODIFICATIONS _y Refer to Section 5.6.6 of the SER. The licensee will. 1. Separate piping areas (areas 203 and 224) from other plant areas by fire barriers, complete with fire doors, fire dampers, and sealed penetrations, of appropriate fire rating, or demonstrate the adequacy of cable / component separation in preserving safe shutdown.

Response

12" Not applicable to these rooms. Refer to page 203-1. 2. Install fire detectors in piping areas (areas 203 and 224).

Response

Not applicable to these rooms. Refer to page 203-1. Revised: 5/20/80 e ~ "

l 1 403-1 ROOM NO. 406 - FIGURE 8 ROOM DESCRIPTION Computer Room - Unit 2 This room contains no safety related/ safe shutdown equipment. PROPOSED MODIFICATIONS .__.._,{ '~ None. NOTE: The previously identified conduit and trays within room 406_ h required for safe shutdown are actually located above the reinforced concrete roof within room 408 which is to be sprinklered. Smoke detectors are presently located in the sub-floor and below the drop ceiling for general room coverage. In addition, a Halon 1301 system is presently installed for cabinet internals and in sub-floor. SER QUESTIONS l. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected opeings and penetrations) of appropriate fire re.sistance. 1

Response

The room is enclosed by concrete walls. The doors into the main control room 405 are 1-1/2 hour rated fire doors and the door to the Electric Switchgear Room 407 is a steel bullet-proof door. These doors are considered adequate as they are commensurate with the fire loads on either side as tabulated below: Fire Load in Minutes ~~ ~ " ~' Room Fixed Transient Total Computer Room 406 10 14 24 l Computer Room 405 7 1 8 l Elec. Switchgear Room 407 33 3 36 Revised: 5/20/80 y

406-2 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

. There.are no, safe shutdown cables or equipment in this _ area. 3. Identify the largest fire that can be expected in each fire area _._ based on_the fixed combustibles in the area and transient combus- - - -a .tibles which may be introduced into or moved through the area. r

Response

According to the Fire Protection Program Evaluation, the fixed fire load is 10 minutes. A Case 1 transient fire would add 14 minutes to the fire load of this room. 4. Identify the worst damage that could result from such fire. ~

Response

This room does not contain-any ' safe chutdown equipment or cable, so a fire will not iinpact safe shutdown. ~ 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

. No safe shutdown equipment or cable is containc.d in this room so that safe shutdown would not be adversely effected, i l EVALUATION OF SER SECTION 5 MODIFICATIONS - MI ~ Refer to Section 5.16.6 of the SER. The licensee will: l. Replace wooden furniture and shelves with those of metal except for work benches in the log and test instrument room (room 435).

Response

Not applicable to this area. Revised: 5/20/80 1 ~" '. .m

~ e 408-1 ROOM NO. 408 - FIGURE 8 ROOM DESCRIPTION Piping Area - Unit 2 This room.contains two divisions of safety related equipment, three - divisions of safety related cable, three divisions of safe shutdown cable, and the following single division of safe shutdown equipment - _r . and, its. associated cabling consisting of atmospheric dump valves --.;- ~ CV-3938 and CV-3939 and their respective controllers. __m;, PROPOSED MODIFICATIONS ~ l. Wet pipe sprinklers will be added at the ceiling per Category A, Criteria l RESPONSE TO SER QUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) or appropriate fige resistance.

Response

This area has 3 hour rated walls, floor and ceiling, except for the communication to area 419 and corridor 410 which are open, and a 1-1/2 hour rated fire door to room 409. A sprinkler system will be provided in lieu of fire rated doors per Criteria 2. _2. Id.entify the minimum separation between the redundant cables (in .... _ trays or in conduits)/ equipment required for safe shutdown in ^~ ~J n-- each fire area. ~

Response

In lieu of additional physical' separation, sprinklers at the ceiling will provide the required separation per Criteria 1 and Category A. l Revised: 5/20/80 l l l ~T ^ "T ~. ~ ~' ~~1

408-2 r 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus- -tibles which may be introduced into or moved through the area.

Response

l

The: fixed fire load is 29 minutes per the original Fire Protection Program Evaluation. The Case 1 transient would add an additional 7 minutes of fire loading.

4. Identify the worst damage that could result from such fire.

Response

C3 One division of safe shutdown equipment and cable could be damaged. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

Sprinklers above the cable trays will prevent the loss of either division unless the fire originates'within one division in which case the sprinkler system will protect the redundant division. ~ ~ If the atmospheric dump valves are damaged, heat removal from ~ - the steam generator can be accomplished by eight safety valves located in another area. Therefore, the ability to achieve safe shutdown is assured. i EVALUATION OF SER SECTION 5 MODIFICATIONS No modifications were required. Revised: 5/20/80

409-1 ROOM NOS. 409 & 429 - FIGURES 4 AND 8 ROOM DESCRIPTION Electrical Penetration Rooms

: r ; -- '  ; n : :'

Unit 1 - 429 Unit 2 - 409 1: . _This-room _ contains two divisions of safety related equipment and, cable,::::

=: : re:

1.___. --and-two-divisions of safe shutdown cable. It does not contain safe shutdown equipment. PROPOSED MODIFICATIONS ___E,____. - 1. Sprinklers will be installed above the cable trays in accordance with Category A and Criteria l r 2. Smoke detection is insiialle_d above.the. cable trays.in.. _ __ _.. ~ accordance with criteria 3. SER QUESTIONS i~-~-~ ~~ 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance. i

Response

This room is enclosed by walls and penetrations having a 3 hour rating. Doors have a 1-1/2 hour rating. The proposed sprinkler system will also serve to prevent a fire from spreading to other areas. Thus adequacy of separation is assured. 2. Identify the mininum separation between the redundant cables (in ~. trays.or.in conduits)/ equipment required for safe shutdown in each fire area. _:2 m.

Response

Sprinklers above cable trays will be provided in lieu of adc itional separation as demonstrated in the discussion of Category A, Cri-i tepi,a 1. .h a Revised: 5/20/80 7-

409-2 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area. ~ ~ Resconse Per.the Fire Protection Program Evaluation, the fixed fire loading ~ " ~;. ,, is approximately 13 minutes. The case 1 transient adds 5 more ~~ minutes. Y 4. Identify the worst damage that could result from such fire.

Response

2 Due to the proposed modification to add a wet pipe sprinkler system I the postulated fire would be effectively suppressed before either division could become involved unless the fire originated within one division, then the sprinkler system would prevent involvement of the redundant division. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioaction release to the environment. - ~;

Response

The proposed wet pipe sprinkler system will protect safe shutdown cables from exposure to transient fires and will prevent fires . originating within a specific division from.affec_ ting the_ red.undant' division. Therefore, the ability to achieve safe shutdown is assured. 4 H EVAI,UATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.17.6 of the SER. ) The licensee will: --- L = -- : 1. Perform hose reach tests and provide additional interior hose stations as necessary to assure the effective manual hose coverage for all points in these rooms.

Response

Rafair to the response to SER item no. 3.1.21. .- L r Revised: 5/20/80

409-3 2. Separate redundant cables in each room by complete enclosure in rated fire barriers, reroute redundant cables out of each preserving safe shutdown. '- -- -~~~j room, or demonstrate the adequacy of cable separation in . _:- :n

Response

Due to the proposed modification to add a wet pipe sprinkler ~~ system, the postulated fire would be effectively suppressed ~~ y before either division could become involved unless the fire ~~ originated within one division, then the sprinkler system . _.. _ _. -._ _;.--. would prevent the involvement of redundant division._ i -r Revised: 5/20/80 3 --o--. -n-. s

414-1 ROOM NOS. 414 & 423 - FIGURES 4 AND 8 ROOM DESCRIPTION Electri al Penetration Rooms Unit 1 423 72 ~- Unit 2 414 This_ room.containstwodivisionsofsafetyrelatedequipmentandcakle[.? . --_and.~.tso divisions of safe shutdown cable. It does not contain safe-- - 2T [ - - ~ - - --shstidows eiguipment. - ~'" ' ~ ' - ~ PROPOSED MODIFICATIONS i 1. Sprinklers will be installed above the cable trays in accordance with Category A and Criteria 1. 2. Smoke detection is installed above the cable trays in accordance with Criteria 1 SER QUESTIONS ~ . ' - ~ _ -.. '. 1. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

his room is enclosed by walls and penetrations having a 3-hour rating. Doors to area 419 have1-1/2 hour rating. The door to area 416 (Unit 2 only) has a 3-hour rating. We proposed sprinkler system will also serve to prevent a fire from spreading to other areas. nus, adequacy of separation is assured. _ 2 _ Identify the =4n4== separation between the redundant cables (in trays .o.r.in conduits)/ equipment required for safe shutdown in each fire area.' ~ ~

Response

Sprinklers above cable trays will be provided in lieu of additional separation as demonstrated in the discussion of Category A, Criteria 1. .a 3. Ideintify the largest fire that can be expected in each fire area based on 'the fixed ccrbustibles in the area and transient combustibles which may be introduced into or moved through the area.

Response

Per tie Fire Protection Program Evaluation, the fixed fire loading is approximately 45 minutes. Se Case 1 transient adds 9 more minutes. Revised: 5/20/80

~---. \\ J 414-2 1 I 4. Identify the worst damage that could result from such fire.

Response

Due to the proposed modification to add a wet pipe sprinkler = system, the postulated fire would be effectively suppressed before either division could become involved unless the fire t originated within one division, then the sprinkler system would prevent involvement of the redundant division. - 5. Demonstrate that such damage will not have an adverse effect' ~ = ' R-on safe shutdown or cause excessive radioaction release to the ~ environment.

Response

The proposed wet pipe sprinkler system will protect safe shutdown cables from exposure to transient fires and will prevent fires originating within a specific division from affecting the redundant - division. Therefore, the ability to achieve safe shutdown is assured. EVALUATION OF SER SECTION 5 MODIFICATIONS ~ T'_$.~.__ Refer to Section 5.17.6 of the SER. The licensee will: 1. Perform hose reach tests and. provide additional interior hose stations ~ as necessary to assure the effective manual hose coverage for all points in these rooms.

Response

Refer to the response to SER Item No. 3.1.21. 2. Separate redundant cables in each room by complete enclosure in rated fire barriers, reroute redundant cables out of each room, or demonstrate the adequacy of cable separation in preserving safe shutdown.

Response

.. J.~. i-l l Due to the proposed modification to add a wet pipe sprinkler system, the postulated fire would be effectively suppressed before either I division could become involved unless the fire originated within one division, then the sprinkler system would prevent the involvement of i the redundant division. - l l ~ Revised: 5/20/80 .--em..

419-1 ROG4 NOS. 419/425/h26 - FIGURES 4 AND 8 m ROCM DESu M ION Cask and Equipnent Loading Area This area contains three divisions of safety related cable and three '~ ~~~ divisions of safe shutdown cable (no safety related or safe shutdown ----- - equipment in this area). -. --One27 n c--- rc PROPOSED MODIFICATIGTS ~~ ~ ~ ~2 ~' 22 5 1. An automatic wet pipe sprinkler system will beandded at the ceiling per Category A, Criteria 1. SER QIESTIONS ~ " 1. Demonstrate the adequacy of separation between adjacent fire areas that are not sepmted by fire barriers (with protected openings r' and penetrations) of appropriate fire resistance.

Response

':'hese three rooms run together as one open area. The addition of the wet pipe sprinkler system will provide separation from adjacent safe shutdown areas as per Criteria 2. A sprinkler head will be provided over the floor opmings for the equipment hatch to preclude fire spread from the lower elevation as per Criteria 2. 2. Identify the minimum separation between the redundant cables (in trays or in conduits)/ equipment required for safe shutdown in each fire area. - - = Resoonse Sprinklers installed at the ceiling will assure that cable separation is adequate and prevent damage to redundant cables per Criteria 1. 2 Revised: 5/20/80 w,

1. -em-

.,wi-,.oo<-+. = -, L

419-2 3. Identify the largest fire that can be expected in each fire area ~ based on the fixed combustibles in the area and transient combus-tibles which may be introduced into or moved through the area.

Response

l Per the original Fire Protection Program Evaluation, the fixed fire loading is approximately 2 minutes. The Case 3 transient adds an undefinable fire loading. The provision of automatic

-- n J-sprinklers at the ceiling, hydraulically designed to provide

~ ~ : a r:

~

.25~gpe/sq. ft., will extinguish / control fires to prevent 'it U - 22. ~ ~~~' damage to safe shutdown cable. 4 Identify the worst damage that could result from such fire. ~

Response

Due to the proposed addition of sprinklers the postulated fire - ~ ' ~ ~ would be effectively suppressed before either division could T~ become involved unless the fire originated within one division, 2 _thus the sprinkler system would orevent involvement of the redun- __ _ _... a cant d1V1S10n. 5. Demonstrate that such damage will not have an adverse effect on L-- safe shutdown or cause excessive radioactive release to the J environment. - ' ' ~J ' T ' i~ -

Response

Based on 2. and 4. above, there will be no adverse effect on safe shutdown from a fire in this area. -{ EVALUATION OF SER SECTION 5 MODIFICATICNS 1_ Refer to Section 5 20.6 of the SER. The licensee will: 1. Identify other safety related cables in the area and analyze the possible consequences of fire damage to these cables.

Response

:e

' ihere are thre'e redundant 'divisioris 'of safety related 'cabI'e in this 4 area. The addition of providing automatic wet pipe sprinklers will preclude the possibility of an exposure fire damaging any division, and internally initiated fires will damage only the division in which it originates _as the sprinkler system will prevent communication of fire between cable trays. 2. Provide the results of an analysis of the radiological consequences of a fire involving solid waste, in particular the spent resin, stored in this area. 1 1

Response

Refer to response to Section 3.2.8 of the SER. Revised: 5/20/80

428-1 ROOM NO. 428 - FIGURE 4 ROOM DESCRIPTION Piping Area - Unit 1 This room contains two divisions of safety related equipment / cable, three divisions of safe shutdown cable, and the following single ~ division of safe shutdown equipment and its associated cabling con sisting of Atmospheric Dump Valves CV-3938 and CV-3939 and their. : :ir

J.u "- '

respective controllers. - : :: n ' ; M-er PROPOSED MODIFICATIONS Z = 1. Wet pipe sprinklers will be added at the ceiling per Category A, Criteria 1. SER OUESTIONS l. Demonstrate the adequacy of separation between adjacent fire areas that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

This area has 3 hour rated walls, floor and ceilings, except for the communication to area 426 and corridor 410 which are open, and a 1-1/2 hour rated fire door to rcom 429. The installation of a sprinkler system in this area will be pro-vided in lieu of fire rated doors per Criteria 2. 2. Identify the mini== separation between the redundant cables (in -- ^ n -~ ; 27 R trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

In lieu of additional physical sepa$ation, sprinklers at the ceiling will provide the required separation per Category A and Criteria 1. 1 Revised: 5/20/80

1 I ...~ j 428-2 l l 3. Identify the largest fire that can be expected in each fire area based on the fixed combustibles in the area and transient combus-c, tibles which may be introduced into or moved through the area.

Response

. The fixed fire load is 29 minutes per the original Fire Protection 2-Program Evaluation. The Case 1 transient would add an additional 7 ~ - - minutes of fire loading. 4. Identify the worst damage that could result from such fire.

Response

~ One division..of safe shutdown cable and equipment could be damaged. 5. Demonstrate that such damage will not have an adverse effect on safe shutdown _or cause excessive radioactive release to the environ-- ment.

Response

Sprinklers provided above the cables will prevent loss of either i _, _. __ division unless the fire originates within one division in which - case the sprinklers will protect the redundant division. If the atmospheric dump valves are damaged, heat removal from the steam ~~ generator can be accomplished.by. the. 8 safety. val.ves. located. in.. another area. l Revised: 5/20/80

431-1 ROOM NO. 431 - FIGURE 4 ROOM DESCRIPTION t Computer Room - Unit 1 1 This room _contains no safety related/ safe shutdown equipment, and two divisions of safety related/ safe shutdown cable locate ( above the 1 ceiling of the room. PROPOSED MODIFICATIONS None. NOTE: The previously identified conduit and trays required for safe shutdown are located above the reinforced concrete roof within room 4237 which-is7o be sprinklered. - Smoke detectors are i presently located in the sub-floor and below the drop ceiling for general room coverage. In addition, a Halon 1301 system is _ presently installed for cabinet internals and in sub-floor. SER OUESTIONS 1. Demonstrate the adequacy of separation between adjacent fire areas - that are not separated by fire barriers (with protected openings and penetrations) of appropriate fire resistance.

Response

l The room is enclosed by 3 hour walls. The doors into the main l control room 405 are 1-1/2 hour rated fire doors and the door to I Electric Switchgear Room 430 is a steel bullet-proof door. These doors are commensurate with fire loads on either sides as tabulated below: 1 Fire Load in Minutes - -~~ ~ - " Room Fixed Transient Total Computer Room 431 10 14 24- '-C-Control Room 405 7 1 8 Elec. Switchgear Room 420 33 3 36 Revised: 5/20/80

m. r 431-2 ~.. 2. Identify the minimum separation between the redundant cables (in . trays or in conduits)/ equipment required for safe shutdown in each fire area.

Response

,__ There is no safe shutdown cable or equipment in this area.

3.. Identify the largest fire that can be expected in each, fire area

.1:(--. - based on the. fixed combustibles in the area and transient combustibles ,)which may bi~ int'roduced into or moved through the area.

Response

According to.the Fire Protection Program Evaluation, the fixed fire load is 10 minutes. A Case 1 transient fire would add 14 minutes,to the fire load of this room. 4. Identify the worst damage that could result from such fire.

Response

_This r$om does not contain safe shutdown cable or equipment and therefore a fire here will not impact safe shutdown. 5. Demonstrate.that such damage will not have an adverse effect on safe shutdown cur cause excessive radioactive release to the environment.

Response

Safe shutdown equipment will not be exposed to damage from a fire in this room. Therefore, the ability to achieve safe shutdown is assured. i EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.16.6 of the SER. The licensee will: Replace wooden furniture and shelves with those of metal except 1. for work benches in the log and test instrument room (room 435).

Response

Not applicable to this area. i i Revised: 5/20/80 l -. - -.,-}}