ML19257B510

Forwards Containment Interior Hazards Analysis Concerning Fire Protection Safety Evaluation & Amends to OL

ML19257B510
Person / Time
Site:	Calvert Cliffs
Issue date:	01/11/1980
From:	Lundvall A BALTIMORE GAS & ELECTRIC CO.
To:	Reid R Office of Nuclear Reactor Regulation
References
013-261-0, 13-261, NUDOCS 8001160501
Download: ML19257B510 (17)

Text

.

BALTIMORE GAS AND ELECTRIC COMPANY GAS AND ELECTRIC BUILDING ,

BALTIMONE, MARYLAND 21203 AnTHun E. LupeovALL.Jn-vice pass.oo ,

J q 11,lg Surate Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors

Subject:

Calvert Cliffs Nuclear Power Plant Units No. 1 & 2, Docket No. 50-317 & 50-313 Fire Protection Safety Evaluation Report and Amendments to Facility Operating License File: 013-261-0, L-037-F

Reference:

BCCL letter dated December 27, 1979 from Lundvall to Reid, same subject Gentlemen:

In accordan.:9 with my letter of December 27, 1979, enclosed please find forty (40) copies of the " Fire Hazards Analysis" for the Containment Interior. Also enclosed are forty (40) copies of revised pages to our sub-mittal of December 21, 1979.

Very'trul yours,

/

r ?"- _ l /

T_[f m _

f, Enclosure cc: J. A. Diddison, Esquire G. F. Trowbridge, Esquire '

,le ssrs. E. L. Conner, Jr. - NHC J. W. Brothers - Bechtel s

1766~29f B 0 0116 0 FC f,

229-1 ROOM NOS. 229 AND 230 - FIGURES 2 TIIROUGli 9 ROOM DESCRIPTION Containment Unit 1 - 230 Unit 2 - 229 The containment contains four divisions.of safety related cable and equipment and the following two divisions of safe shutdown equipment and its associated cabling:

1. RCP Seal Leakoff Valve 1-CV-506

2. Pressurizer Sample Valves 1-CV-5465, 1-CV-5466 and 1-CV-5467

3. Reactor Cold Leg Temperature 1-TE-ll5,1-TE-125,1-TE-lllY and 1-TE-121Y

4. Reactor Hot Leg Temperature 1-TE-lllX and 1-TE-121X

5. Charging Letdown Valves 1-CV-515 and 1-CV-516

6. Shutdown Cooling Return Isolation Valve 1-MOV 652

7. Pressurizer Heaters

8. Steam Generator Level 1-LT-1105, 1-L7-1111, 1-LT-1106 and 1-LT-ll21

9. Reactor Core Temperature

10. Pressurizer Level 1-LT-103,1-LT-110X and 1-LT-110Y

11. Pressurizer Pressure 1-PT-100X and 1-PT-100Y

12. Auxiliary Spray Line Valve 1-CV-517

13. Pressurizer Power Operated Release Val /es.1-ERV-402/1-MOV-403 and 1-ERV-404/1-MOV-405 ,

Pfl0POSEDMODIFICATIONS

1. A new Reactor Ci elant Pump oil collection system will be installed.

Reference the response to SER question 3.3.4, "RC Pump Lube Oil Collection System."

2. Fire detection devices will be installed in the electrical penetration areas and in the containment recirculation HVAC ducts.

3. For redundant safe shutdown raceway routed within five feet and not protected by physical barriers, such as concrete walls, one of the two raceways shall be wrapped in a rated fire resistive material.

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.

Hesponse The containments are 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire rated structures with no possibility of fire spreading into or out of the area. Entry into the area is strictly controlled at all times.

176$ 292

229-2

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

Response

In lieu of separation between redundant safe shutdown cable, one of the two raceways will be wrapped in a rated fire resistive material.

The following lists safe shutdown equipment and their safe shutdown separation relationship:

1. RCP seal Leakoff Valve 1-CV-506 and Pressurizer Sample Valves 1-CV-5465, 1-CV-5466 and 1-CV-5467 - Redundant components are located outside the containment.

2. Reactor Cold Leg Temperature 1-TE-ll5, 1-TE-125, 1-TE-lllY and 1-TE-121Y and Reactor Hot Leg Temperature 1-TE-lllX and 1-TE-121X -

Redundant instruments are located remotely and separated by con-crete shielding.

3. Charging Letdown Valves 1-CV-515 and 1-rV-;'S - Valves are normally open but will fail safe in event of fire.

4. Shutdown Cooling Return Isolation Valve 1-MOV-652 - This valve is normally shut and is not required to change position immediately.

Manual valve operation can be accomplished following fire suppres-sion to reach cold shutdown.

5. Pressurizer Heaters and Pressurizer Power Operated Relief Valves 1-ERV-402/1-MOV-403 and 1-ERV-404/1-MOV-405 - These devices are enclosed and isolated from adjacent areas by concrete walls and the area is devoid of co'mbustible materials.

6. Steam Generator Level 1-LT-1105, 1-LT-llll, 1-LT-1106 and 1-LT-ll21 -

Redundant instrumentation is separated by 100 feet and concrete walls.

7. Reactor Core Temperature - In core instrumentation is run in conduit.

8. Pressurizer Level 1-LT-103, 1-LT-110X and 1-LT-110Y and Pressurizer Pressure 1-PT-100X and 1-PT-100Y - Redundant instrumentation is more than 10 feet apart, column / wall mounted, above grated floors and not exposed by combustible materials.

9. Auxiliary Spray Line Valve 1-CV-517 - This valve is normally shut and will fail closed.

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

Per the Fire Protection Program Evaluation, the fixed fire loading in the containment is approximately 16 minutes. Approximately 50% of the fire load is due to electrical cables in tray, the majority of which are located at elevation 45'-0" in the area of the electrical penetra-tions. The only credible fire would be one due to a fire involving the cables in tray. Cable tray initiated fires have been demonstrated by Sandia Laboratories Test Report, " Cable Tray Fire Tests" SAND-77-ll25C dated July,1977 to be slow propagating and are effectively contained within the initiated tray. Should a tray initiated fire occur, damage to only one division of safe shutdown cable is postulated since redundant raceways close enough to be affected by a single fire will be wrapped in a rated fire resistive material.

1766 293

229-3 The RCP lube oil comprises approximately 49% of the fire load with the remaining 17. being scattered miscellaneous material.

As discussed in the response to SER question 3.3.4, the RCP lube oil collection system will prevent a fire resulting from a lube oil release.

Transient combustibles can only be expected during plant shutdown as containment access is severely limited during reactor operation to operational inspections. Transient combustibles introduced during plant shutdown would be removed as a part of the final containment inspection prior to startup. Therefore, safe shutdown could not be jeopardized by transient combustibles.

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

Response

The following safe shutdown cable / equipment could be damaged: CV-506; C V-54 6 5, CV-5466 and CV-5467; TE-ll5 or TE-125; TE-lllY or TE-121Y; TE-lllX or 121X; CV-515 or CV-516; LT-1105/LT-llll or LT-1106/LT-ll21; Pressurizer lleaters (A or B); LT-103, LT-110X or LT-110Y; PT-100X or PT-100Y; ERV-402/MOV-405 or ERV-404/MOV-403.

5. Demonstrate that such damage will not have an adverse effect on safe shutdown or cause excessive radioactive release to the environment.

Response

As identified in the responses to SLR 2 and 4 above, only one division of safe shutdown cable / equipment could be affected; therefore, safe shutdown of the plant is assured.

Since the prime purpose of the containment is to prevent the release of radiation to the environment, there would be no radiological consequences of a fire in these areas.

EVALUATION OF SER SECTION 5 MODIFICATIONS Refer to Section 5.19.6 of the SER.

1. Demonstrate the adequacy of cable / equipment separation in preserving safe shutdown.

Response

Refer to the response to SER question 2.

2. Install fire detection devices in areas which contain safety-related cables and/or equipment.

Response

Fire detection devices will be installed in the containment rceircula-tion HVAC ducts to provide whole area detection. Also in the vicinity-of the electrical penetration arcas which constitutes the only credible major fire load.

17166 294

229-4

3. Perform hose reach tests to ensure that all fire hazards can be reached by at least one effective hose stream.

Response

Ilose reach tests have been performed and all areas can be reached by at least one hose stream. See the response to SER question 3.1.21, "f.!anual llose Coverage."

l 1

176~6'295

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 maintain-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 13 remote sound powered phone jacks as shown on the  ;

attached draft Riser Diagram. Jacks will be located as follows: j (1) Unit 1 and 2 Containments - 3 jacks each at El. 10'-0", El. 45'-0",

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

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

El. 27'-0", El . 45 '-0", El . 69 '-0" at stairway entrances.

(3) Rooms 603 and 605 (Aux. Feed Pump Hooms - 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 spreading 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 powered equipment will be compatible with the existing system. These modifications will be accomplished by June, 1930 subject to timely review approval by the NRC staff.

3.1.14* Hydronen Piping (5.4, 5.3, 5.9)

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

Response

Design drawings and details will be furnished for NRC staff review prior to implementing the modifications described above in the SER.

Revised: 1/11/30 1766 296

Ele c. Eng.

13. G. c. E. C o (12t a. 9 571-X (82 6973 v

i 5.

i 5

~

' s 10 r

I (p ClK 2) r, CIRC. 9 C. 3 (CIRC.l .T rr) e -!

l

( CIRC. 2,4 o >

e . -. u c :c EL . 69'- O" -c tI4 C . l- 4 'O .

fpO h CIRC 9 - / CONTFOL RtA. _.g (p 31 f-p I

O ..

-- { .s -i c

k C1 C. 2 CIRC. 3 os

$h a

f" d

ff 7 8

, -- 2 01 3 C)MC 4 > '- s- h NC; 3 ._/_ o 9,'

.(-- ELECl RIC/nl h El . 4 5'- O~ C il<C. S. o- __

~

LLECTatCAt s l'1 t R1 R AT ION 5

rT1

-t Oiu PENE TR AT ION a'

q ZM ,t--

O 4 m @ l ri

' C '" 3 h _E L 27' O' UtJni 2 UNIT l

'$ (I. 3 r- -4 9 2 603 605 O lu a 1 -

II 1

.I W -(.

[L.lO'd i ClfsC. 3 E L . i O*- O" C , ,

y'f EL. 5' O'

" E L. 12 *- O" $

LCIRC.5 ry q a O ey

!h -Q d

' -r-

. '.2 EIIll O y g gj.y p$ Q' UMIT 2. TEMDOM AB-2 STAIRWi# - Ab I MAi!WJAY llM%il UNIT I TURStfJE ED CONTAINMENT ACCESS ACCL55 CONTAIMMLtJT BUILDINC. .

mm e

!9 f AUXILIARY 15 U IL D ild 6 or.lil 1 l ASl S!_/lR.W. A_f k,, ,.5 g.

E_AST STAIRWAY.UM. ir 2 g o e.

.- N L.*

' E.

.n - L EG L I 10 : -- 3 ,

O M hJ C' o g .

6 \_e/ SOUND POWENED T it EPif 0fJE OUTLE T. '

w' \ ~

'o bloD l_ l-'

s s N f. FOR P L Aid LOCA flCtd OF AEOVE arf 76, SE E g.

D SHEET E GF T)llS SNETCH . s U

11. G . & F . C e E le c. t. .g.

( 126a ).9 57 3.X (82 697) n  ?

8 . 'N-

---

._ Z _: __~_____.

a.

E bu g -t- P-n

- s$

s E s

-(  % WEST WEST I >

g EMETRnTion PltJE IRATIOy.f-g WEST '

y WELT g STAIRVMY STAIR WAY

~. -.y S io

]l.!Ik>. ._

b _ AB-2 3 51 AIF.WAY O

E UNIT 2 AU X illl/t R Y UtJIT l [ g CONTAIMMEiOT BUIL 11tm COMTAIN MEtJT 5N / t' ..

,-                                                                                                                   . ---. \

h N EAST / COPJ I F:OL I .0 ci n EAST o g7 STAIRW4Y j/ EL.4 5 ' OtJLY ST61MjoY  :' 5 F=

                                       ~ LD ~~~T]        /' \
                                                                                                                                                                  A FFFml -                                   '

[J ~ EAST 7- f- 'l 3 LAST Pli.)L TRAT100 t N mas t E N' L. t J PLFJET RATI0t' g n- ---- s 7 E NDCro J =- , i_. -q { -{ .- I-n b:,r r toc. m 4------ 'l r TE tJ COM - ACC E SS - --

                                                                                                --e   t l -- -

ACCE S S ppp o-

, l AM - 1 ra, r*

lt (o - I S T AINP!AY

                                                                                                     .i
                                                                                                                                                                                                          z? S. n 3
      ^ 1 J_TM _ _ _. _. _ __ _ _ _ .                 __
                                                               ,,_----,2-                :Z Z .       ^_           . _

_1'~ ; __ _. _~ _ _ __ T ._!-/ $ O @ 60'3 (,0 7 - k

                                                               -~ _.._. d n       (5                        -
                                                                                -- E t I ?. '- O ~ O f )LY

• ~ '-- -

                                                                              ',TUf(Pil)E f Uit Cit %                             ~ ~ ~ ~ ' '__ . _. _ _ -' - - -                                       am           C%

N 5 ~ a e C 9 w I !. i . n y ra. i y Et.nis'o , s a n. . .v, o , c ,., .o -

TA11LE l PAGE 1 0F 12 Pit 0 POSED PLANT MODIFICATIONS FOR FIHE PHOTECTION UPGHADE ItOOM NO. FIRE DETECTION FIltE SUPPHESSION OTi!ER MODIFICATIONS 100/103/116 Smoke Detection Sprinklers under 1. Wrap zC and zis conduits. at Ceiling Trays except Room l i ti 2. Place sprinklers to cover entire floor area. 101/119 Smoke Detection None 1. Wrap ZC conduit. at Ceiling 2. Add fire damper to ceiling and wall llVAC duet penetration.

3. Close blockouts between Itoom 118 and 119 and 101 and 102 with fire rated 3 hour stop.

4. Provide interlock to close motor operat.ed IIVAC dampers at ceiling and wal1 on acLuation of smoke detectors.

5. Close blockouts between Room lid, 119, 101, and 102 and the Corridors 100 and 103.

102/118 Smoke Detection Nonc 1. Same as 101/119. at Ceiling I 103/116 See Hoom No. 100 104 Smoke Detection None 1. Wrap ZC conduit. g at Ceiling -1 Ch Revised: 1/11/d0 y N-4

PAGE 2 OF 12 ItOOM NO. fille DETECTION FIIIE SUPPitESSION OTilER MODIFICATIONS 105/115 None Sprinklers at Ceiling 1. Provide curbs at entrance and between compartments.

2. Add f' ire damper in llVAC duct communicating with Itoom 106/113.

106/113 None Sprinklers at Ceiling None 107/114 Smoke Detection None None at Ceiling 108 Smoke Detection None None at Ceiling lo'J/112 None None None N

p. llo Smoke Detection None None y at Celling u

O C- 111 Smoke Detection None None at Ceiling 113 See Itoom No. 106 l Itevised: 1/ll/do

PAGE 4 0F 12 H00M No. FIRE DETECTION FIltE SUPPitESSION OTilElt MODIFICATIONS 204/225 Smoke Detection Sprinklers under Trays 1. Wrap ZB and ZC raceway. at Ceiling 205/226 None Sprinklers at Ceiling None 206/227 Smoke Detection None None l at Ceiling i 207 None None None 203 None None None 209 None None None 210 Smoke Detection None None at Ceiling Q O'

• cts Itevised: 1/11/d0 u

C~) -

o d l g / l l 2 / 1 d 1 n F a O  : 0 d 5 2 e S 2 s E N i G O n v A I e e P T e t I A w C t I e F b I . D s3 O t1 M u2

             .       o H      t           kd E      i            cn i        u           oa T      d           l O        n         b4 o              1 c         l 2 l

s i ad Z n p ea s a o8 r l 1 W C2 e e e e e n n n n n

             . o    .       o    o         o       o 1        N  1        N     N         N      N y                   g    g                 g a                   n    n                 n N        r                 i    i                 i O      T                   l     l                l I                           i    i                 i S       t e    e                 e S        e                 C     C                C i

l d t l n t t t l' u a a a P U s s s s S r r r r e e e e i l l l l t t k k k k i n n n n F i e e i i e i r n n r p r n r p o o p o p S N N S S N S 4 n n 1 n N o o 2 o O i i i I t t . t T c c o c eg C eg eg N E t n t n t n T ei ei m ei E Dl Dl o Dl D i i o i ee ee t I ee i t kC e kC e e kC e l t o n o n n e o n i mt o mt o o e mt o F S a N S a N N S- S a N O A / N 9 0 8 7 6 61 1 2 1 1 1 2 2 M 2 2 2 2 2 33 0 / / / / / CC 0 I t 1 2 2 3 1 2 4 1 2 1 5 2 6 1 2 3 1 2 1 l 2l 2E 2 2 2 N@@ wQN

PAGE 6 0F 12 It00M NO. FIltE DETECTION FIltE SUPPitESSION OTilEli MODIFICATIONS 223 None Sprinklers at Ceiling None 229/230 Flame Detection Nonc 1. L J rap redundant raceways.

2. Provide an itCP oil collection system.

I A/ lu/2A/2il Smoke Detection Automatic Sprinklers None at Ceiling (existing) 301/304/305/307 None None None 302/306/lC/2C Smoke Detection Italon 1301 1. Interlock 11alon with IIVAC. at Ceiling total flooding 2. Actuation of llalon by detectors.

3. Electrically supervise all doors.

308 None None None 309/315 None Sprinklers at Ceiling None 'N Ch Ch itevised: 1/11/80 U C") u

s PAGE 7 0F 12 itOOM NO. FIltE DETECTION FIltE SUl'l'ItESSit)N OTilEH MODIFICATIONS 310/316 Smoke Detection None

1. Wrap ZH conduit.

at Ceiling 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 None at Ceiling 320 Smoke Detection None None at Ceiling Smoke Detection None None 322/324 at Ceiling s N ' @ Itevised: 1/ll/d0 w Q

PAGE 8 0F 12 HOOM NO. FIRE DETECTION . r'tE SUl*PitESSION OTilEH MODIFICATIONS 323 Smoke Detection None None (includes all at Ceiling of filter C ion Passage Area exchanger ros) None None i _325 _ Smoke Detection - - l 327/328 None None None (See Itesponse to SER Item 3.1.18.) l 400/401/402/ Smoke Detection None None 403/404/4_05/ (Existing) l 415/432/434/ 435/436/437/ 438 4 0 t> Smoke lletection IIalon 1301 1. Wrap ZA and ZC conduits. (Existing) (Existing) Additional Smoke Detection above Drop Cei1ing 407/430 Smoke Detect. ion Nonc 1. Wrap the redundant division of raceway. at Ceiling (Existing) 408 Smoke Detection Sprinklers at Ceiling E 1. Wrap redundant conduit between P line and Above Trays in under Trays between P G M line. Areas Between M lines P Line C M Line nevised: 1/11/d0 Ch CA u CD Ln

PAGE 9 OF 12 1100:4 NO. FIltE DETECTION FIltE SUPPitESSION OTilElt flODIFICATIONS 409/429 Smoke Detection Sprinklers under Trays 1. Wrap one division of shutdown cable. l at Ceiling (Existing) 41O None None None 1 412 None None None 414/423 Smoke Detection Sprinklers under Trays 1. Wrap one division of conduit. at Ceiling (Existing) 416/421/422 Smoke Detection Preaction Sprinklers None at Ceiling at Ceiling (Existing) (Existing) 417/418 None Sprinklers at Ceiiing None (Existing) 419/425/426 Smoke Detection Sprinklers at Ceiling 1. Wrap twa divisions of shutdown cable. Above Trays in West of P I.ine and the Areas Adja- below Trays East of cent to the P Line

      . Containments N                                                                                 itevised : 1/11/30 y

Ch

.W CD Ch

l' AGE 11 dF 12 ItOOM NO. FIltE DETECTION FIltE SUI'l*ltESSI ON OTliElf MODIFICATIONS 501/502/503/ None None None 504/505/506/ 507/508/509/ 510/511/513/ 514/515/516/ 517/518/519/ 521/522/523/ 534/535 512 Smoke Detection None None at Ceiling 520 None None None 524/ 52ti Smol<c Detection Nonc 1. Class A Fire Doors. at Ceiling 525/527 Smoke Detection None None at Ceiling 523/530/ None None None 533/536/ l 537 - Itevised: 1/11/do N CB Ch u O J}}