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Revision as of 18:50, 27 February 2020
| ML19308C508 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 01/31/1980 |
| From: | BOSTON EDISON CO. |
| To: | |
| Shared Package | |
| ML19263F437 | List: |
| References | |
| NUDOCS 8001280361 | |
| Download: ML19308C508 (100) | |
Text
{{#Wiki_filter:- .: 2_ . - - - - . - - I CONTENTS I ' I - Section Page I. INTRODUCTION 1 II. DESCRIPTION OF EACH CRITICAL FIRE ZONE 1 III. SAFE SHUIDOWN SYSTDIS 6 IV. ANALYSIS PROCEDURE 8 A. Assumptionu 9 B. Method 10 C. Legend 10 I V. ANALYSIS OF EACH FIRE ZONE I 1. 2. 3. Fire Zone 1.9 Fire Zone 1.10 Fire Zone 1.11 12 26 38 4 Fire Zone 1.22 46 I 5. 6. Fire Zone 2.1 Fire Zone 2.2 51 56
- 7. Fire Zone 2.10 58
- 8. Fire Zone 3.2 62
- 9. Fire Zone 3.5 64 VI. SCHEDULE FOR COMPLETION OF MODIFICATIONS 71 VII.
SUMMARY
71 VIII. REFERENCES 73 IX. ATTACHMENTS 74 A. Quelcor Technical Data B. Area Usage Analysis X. FIGURES AND DRAWINGS I 1
-~
LIST OF FIGilRES Item Figure # Title M { l. I-4 Fire Protection System - Plan at El. -17'-6" to 15"-0"
- 2. I-5 Fire Protection System - Plan at El. 23'-0"
- 3. I-6 Fire Protection System - Plan at El. 37'-0"
- 4. I-7 Fire Protection System - Plan at El. 51'-0" and 74'-2"
- 5. G.0-36a Protection Sequences for Total Loss of Offsite AC Power
- 6. C.0-36b Protection Sequences for Total Loss of Offsite AC Power
- 7. G.0-26c Protection Sequence for Total Loss of Offsite AC Power
- 8. DPR35-1 Analysis Sequence Diagram
- 9. M200 P&ID Legend _
- 10. M240 P&ID Legend (GE)
- 11. M241 Residual Heat Removal System (P&ID) 12 M242 Core Spray System (P&ID)'
{ 13 M243 HPCI System (P&ID) 14 M244 HPCI System (P&ID)
- 15. M245 RCIC System (P&ID)
- 16. M246 RCIC System (P&ID)
[ 17. !G52 Nuclear Boiler (P&ID)
- 18. M253 Nuclear Boiler (P&ID)
{ LIST OF TABLES Item Table Number Title
- 1. I Safe Shutdown Systems in Fire Zone 1.9
- 2. II Safe Shutdown Systems in Fire Zone 1.10
- 3. III Safe Shutdown Systems in Fire Zone 1.11
- 4. IV Safe Shutdown Systems in Fire Zone 1.22
( 5. V Safe Shutdown Systems in Fire Zone 2.1
- 6. VI Safe Shutdown Systems in Fire Zone 2.10
- 7. VII Safe Shutdown Systems in Fire Zone 3.5 r
L - 11
. _ ._ - . - - - - . - - - - . - - . - - . - - - - . . - - _ ~ . - I LIST OF BECo SKETCHES - < I Fire Zone Number Title 1.9 #1 Section D - Elevation Looking Eact
#2 Section C - Elevation Looking Fortheast
#3 Section B - Elevation Looking 1: orth
#4 Section A - Elevation Looking North 1.10 #11 Section K - Elevation Looking South
#12 Section K - Elevation Looking North I #13 Section L - Elevation Looking East 1.11 #1 Section AA - Elevation Looking West
#2 Section BB - Elevation Loog.ing East 1.22 #1 Section BB - Elevation Looking East
- 6. Section AA - Elevation Looking North 2.1 #1 Switchgeer Room - Elevation,37'-0" and 23'-0" I 3.5 #1
#2 Section AA - Elevation Looking North Section BB - Elevation Looking West I
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LIST OF DRAWINGS I Drawing No. Title E298-V-1 Reactor Building Areas 1&3 - Plan Above El. 23'-0" E298-V-2 Reactor Building Areas 1&3 - Plan Above El. 23'-0" E301-V-3 Conduit and Cable Tray Layout-RB Area 153 - Plan Below El. 51'-0" I E309-V-4 Reactor Bldg. Aux. Bay Area 2 - Plan Between El. 3'-0" and (-) 17'-8" E328-V-5 I Turbine Building Area 9 - Plan Below El. 37'-0" l l E329-V-6 Turbine Building Area 9 - Plan Below El. 51'-0" I E320-V-7 Turbine Building Area 7 - Plan Below El. 23'-0" and Below 37'-0" E321-V-8 Turbine Building Area 7 - Plan Below and AbcVe El. 51-0" E333-V-9 Cable Spreading Room - Plan El. 23'-0" (Sheet 1 of 2) I E320-V-10 Turbine Building Area 7 - Plan Below El. 23'-0" and Below 37'-0" 1 iii i
I. INTRODUCTION In the Safety Evaluation Report, which was included as part of Amendment 35 to the Technical Specifications to Facility Operating License No. DPR-35 for the Pilgrim Nuclear Power Station, Safe Shutdown Capability was identified as an incomplete item of review in Section 3.2.1 and for which additional information was required. Specifically, the additional information consisted of submitting i safe shutdown analysis to demonstrate that. fire __ _ _ [_ r_ elated damage in iach of the nine critical fire zones would not inhibit the capability to safely shutdown the plant. The nine critical fire zones are identified as follows: Fire Zone No. Area 1.9 Control Rod Drive Module Area - East 1.10 ~ Control Rod Drive Module Area - West . 1.11 Open Area - East Half of Reactor Building 1.22 Reactor Bldg. - Closed Cooling . Water Pump Rs. "B" 2.1 Switchgear Room B 2.2 Switchgear Room A
. 2.10 Feedwater Heater "B" 3.2 Cable Spreading Room 3.5 Vital Motor Generator Set Room.
The analysis for Fire Zone 3.2, Cable Spreading Room, was previously submitted on 10/5/79. However, submittal of the analyses for the nine fire zones was extended for 90 days by the NRC letter of 10/22/79,. Reference (d). Also included in this letter was the staff's position entitled, " Safe Shutdown Capability'.'. The purposes of this report are to:
- 1. submitthesafeshutdownanalysesforthe$emainingeightcriticalfire zones, and
- 2. provide the specific information required by the NRC staff to complete their review of the analyses.
l IT. DESCRIPTION OF EACH CRITICAL FIRE ZONE b A description of each of the nine critical fire zones is as follows: Fire Zone 1.9 Control Rod Drive Module Area - East The location of Fire Zone 1.9 is shown on Figure I-5 as the area between 1 1
. . _ _ . . . _ _ _ _ _ . . _ _ _ . . _ _ . . . . . _ 1_ n --
I columna 11-P c.nd ll-H, on thm w at, and columns ~ .'-P and 17-H on tho est. A 3-hour fire rated wallseparates Fire Zone 1.9 from the Feedwater Eeater area I (Fire Zone 2.10) on the south, Diesel Generator Building (Fire Zones'4.1 and 4.3) on the north, and the Cable Spreading Room (Fire Zone 3.2) on the east. Control Rod Drive Module Area - West (Fire Zone 1.10) is located on the west side of I the Reactor Building. There is no physical separation between Fire Zones 1.9 and 1.10. Access to Fire Zone 1.9 is throughtwo 3-hour fire rated doors; one is located in the east wall (column 17-iQ and the second is in the west wall (column 4-N).
~~
A stairway provides access to higher and lower elevations. ~An ele'vator'is~~ i located next to the Decontamination Room (Fire Zone 1.25) and provides access . _. - ..- to higher cud lower elevations. ., Fire Zone 1.10 Control Rod Drive Module Area - West-The location of Fire Zone 1.10 is shown on Figure I-5 as the area between columns SP and SH, on the west, and columns ll-P and ll-H on the east. A 3-hour fire rated wall separates Fire Zone 1.10 from the Feedwater Heater (Fire Zona 2.10) on the south and the Auxiliary Plant Heating Boiler (Fire Zone 1.26), Water Chemistry Iacoratory, and the Water Treatment area on the west. A 3-hour I fire ratad wall encloses the northern area of Fire Zone 1.10. I 1. two 3-hour fire rated doors in the Truck Lock (column 5 and column 1.3). I 2.. two 3-hour fire rated doors (air lock type) between the Water Chemistry Laboratory and the Truck Lock at column 4-N, and 3. i two 3-hour fire rated doors (air lock type) in the east wall at column 17-K. There is a 20' x 20' square equipment hatch opening from El. 23'-0" to . El. 117'-0". Secondary containment integrity, through the Truck Lock area,is maintained by interlocks installed between the outer and the inner 3-hour fire rated roll-up doors. A stairway and elevator, in the eastern r , part: (Fire Zone 1.9) of the Reactor Building, provide access from El. 1,'-W' 2
~ -
_ _ _ _ . 1 I to El. 117'-0". A second stairway is located at the southwest corner and provides access down to the RCIC quadrant. There is a third stairway located in theimiddle of the area and provides access to upper elevations only. I - Fire Zone 1.11 Open Area - East Half of Reactor Building Fire Zone 1.11 is an open area in the east half of the Reactor Building at El. 51'-0". It is separated by a 3-hour fire rated wall on the east (column 17P and 17J), on the north (colusi 17F and ll?) and on the south (column 11J and 17J). There is no physical separation between Fire [ Zones 1.11 _ and 1.12 on the west' side of the Reactor Building at this elevation. Access to Fire Zone 1.11 is controlled by'
. 1. a stairway in the northeast correr and,
- 2. an elevator located next to the otairway The stairway and elevator provide r.: cess to hLgher and lower elevations from .
this floor. Fire Zone 1.22 Reactor Building - Closed Cooling Water System Pump Room "B" The location of Fire Zone 1.22 is shown on Figure I-4 and is the area between columns 3P and SP,and 3L to SL in the Reactor Building Auxiliary Bay. It is separated from the RBCCW Pump Room A (Fire Zone 1.2D on the south and from the RER and Core Spray Pump Room (Fire Zone 1.") oy a 3 hour fire rated wall on the east. Access to Fire Zone 1.22 is by means of a steel, marine type watertight door. A 3-hour fire rated folding door will be installed at this location as part of BECo's commitment to SER, Item 3.1.7, " Fire Doors". Through passage of personnel is restricted by the watertight door. A steel hatch in the floor provides alternate emergency access to the HPCI Guadrant below. Fire Zone 2.1 Switchgear Room B The location of Fire Zone 2.1 is shown on Figure I-5. A 3-hour fire rated wall separates Fire Zone 2.1 from tfie Cable Spreading Room and the Access Control Area on the north. A six foot square ventilation I _ . .
I penetration will be fitted with a 3-hour fire rated damper. l On the ease r side, Fire Zone 2.1 is bounded by an exterior wall. The 3-hour fire rated south wall provides separation from the Turbine Rotor Laydown Area. The two doors and the mechanical and conduit I penetrations have 3-hour fire ratings. A twelve-foot square ventila-tion opening will be fitted with a 3-hour fire rated damper. 0". the west side, Fire Zone 2.1 is separated from Battery Room B by a 3--hour fire.irated wall. Switchgear Room _A is located above Fire Zone 2.1
~.1 Fire Zone 2 is divided along the north-south axis, at approximately column line 19.6 by a chain link fence which forms a 4-foot wide corridor, which is used for access to, and egress from, the Access Control Area. A gata is provided in the fence for access to the Switchgear Room. The gate is under the control of the Access Control -
See.urity System and is normally closed and locked. The second door, in the north wall, is accessed off the Control Room stairs; it is used as a traffic path to the Control Room and is under the control of the Access Control Security System. The south wall contains two doors. One, at column line 19.6, is used as the normal access route to the Access Control Area; the other one is a double door, at the approximate location of column line 17.5, which is used as an exit for both fire and emergency evacuation routing. This door is tiso under the control of the Access Control Security System. Fire Zone 2.2 Switchgear Room A The location of Fire Zone 2.2 is shown on Figure I-6. It is separated from the co .: col Room, on the north, by a 3-hour fire rated
- wall which ,
cone.ains cable penetrations and a 3-hour fire rated door. 4. E I .. . .. .. __
l. E The 3-hour fire rated south wsil esperates this fire zona from the Turbina Rotor Laydown Area. The cable penetrations will be upgraded to a 3-hour fire rating. The south wall contains a twelve-foot square ventilation I opening which will be fitted with a 3-hour fire rated damper. Fire Zone 2.2 is bounded on the east side by an exterior wall and on the west by a 3-hour fire rated wall which separates it from Battery . Room A.. This wall contains cable tray penetrations and a 3-hour fire rated door. This door, which is accessed from the Control Room i .. . _ . _ . - - . . . . . stairs, is under the control of the Access Control Security System. This fire zone is not used as a pathway to or from any other plant
' area nor does it serve as an evacuation route during any plant or site emergency condition. .._ _ . . - - . _
I ._ _ _ . _ . _ . . . _ . . _ . . _ _ Fire Zone 2.10 Feedwater Heater "B" Fire Zone 2.10 is located in the Turbine Building between EL.5'0" and EL. 51'0" (column 11-H & 16-H; ll-E & 16-E). It is separated by 3 hour rated walls from the Vital MG Set Room, on the east,_and the CRD Maintenance Shop and CRD Control Units on the north. Fire Zone 2.9, Feed Water Heater i A, is located to the east.
~
Access to Fire Zone 2.10 is through 3 hour rated fire doors located at columns 17-H, 14-A and 3-E. Bechtel Drawing E-320 shows Fire Zone 2.10 at two elevations; namely, below EL.37'-0", and below EL. 23'-0". Fire Zone 2.10 occupies (1) the area between columns 11 and 16 for plan view below EL. 37'-0", and (2) the area between columns 11 and 18 for plan view below EL. 23'-0". I > I
i Fire Zone 3.2 Cable Spreading Room 6
. The location of Fire . Zone 3.2 is shown on Figure I-5 as the area between columns 17-H.7 and 20-H.7, and columns 17-E and 20-E. It is separated from the Access Control Area, on the north, by a 3 hour fire rated wall.
On the south, it is separated from the Switchgear Room by a 3-hour fire rated wall. Fire Zone 3.5 Vital Motor Generator Set Room The location of Fire Zone 3.5 is shown on Figure I-5 as the area between columns 16-E and 16-H, on the west, and columns 18-E and 18-H on the east. A 3 hour fire rated wall separates it from the Cable Spreading Room on the north and east sides and from the Feedwater Heater Bay on the west side. A stairway, which provides access to higher and lower elevations, is located ; outside the_ southern end of the room. -- Access to the Vital MG Set Room is via a. 3 hour fire rated door - usin card keys. Through passage from this area is not possible. ' s U,I .
- SHUTDOW SYSTEMS SA.T A determination was made of all systems whose integrity must be maintained in order to conduct a safe plant shutdown. For an event, such as total loss of offsite a-c power, these systems are:
- 1. HPCI or RCIC, 2 RHR Torus Cooling Mode,
- 3. ADS, and
- _ _ _ . . . . 4.
. _ _ _ _ _ . _ . . . . . . . . _ . . . ..RER Shutdown Cooling Mode .
This event has been analyzed and previously reported as Event 28, - f . L Appendix G, of the PNPS #1 FSAR. The total analysis is included r here for convenience of the reviewer. 1 6
- - . - :- . :: ? .___ __- __
~
I
" Event 28 - Total Loss of Off-Site Power There is a variety of possible electrical failures of which total loss of off-site a-c power is the most severe." Each case is considered under all planned operating conditions. Figure G.0-36a shows the various electrical sequences considered by this analysis. The sequences are selected by applying the abnormal operational transient selection criteria.~
As shown in Figure G.0-36b, the reacte' ,,rotection and control rod drive systems effect a scram on turbine trip or loss of Reactor Protection Syst:em M-G sets. The reactor vessel isolation control system and the main steam line isolation valves act to isolate the reactor vessel. Af ter the main steam line isolation valves close, d decay heat slowly raises system pressure to the lowest relief valve setting. Pressure is relieved by the nuclear system pressure relief system. After the reactor is isolated and feedwater flow has been lost, decay heat may cause an increase in nuclear system pressure, eventually : lifting relief valves and allowing reactor vessel water level to decrease., The core cooling sequence shown in Figure G.0-36c shows the short and long term sequence for achieving adequate cooling in spite of any single failure. This same sequence could be used in any situation in which the main heat sink and normal feedwater flow are lost. For initial pressures over 104 psig either the RCIC or HPCI maintain water level in the reactor vessel as steam is relieved via the relief valves to the torus. The RHR torus cooling mode can be used to remove the heat received by the torus water. When the torus water temperature limit is reached, a controlled depressurization must be started by operating. the relief valves through remote manual control (considered part of the 7 I = ..
. . _7 . _ . - . . . . _ _ _
E tha cutomatic d:prescurizction cyctem). Senreing ths dsproccurizstion at this temperature limit assures that the torus water retain's its capability to suppress a full blowdown of the nuclear system within the bounds of the experimental data observed in actual pressure suppression Depending on nuclear system pressure, the RCIC', HFCI,. LPCI, or tests. I core spray systems can be used to maintain reactor vessel water level until the shutdown cooling system can be placed in operation (planned operation). For initial pressures between 75 and 104 psig, high pressure cooling is not required. By manually actuating the relief valves, the nuclear system pressure is maintained low enough that the LPCI and core spray system can cool the core. For initial pressures less than 75 psig, the system is icturned to planned operation shutdown cooling." I IV. ANALYSIS PROCEDURE , An analysis of each o' f the 9 critical fire zones was perforned to determine if fire related damage could inhibit' the capability to safely shutdown the plant. The results of each analysis are" described in Section V. If an analysis demonstrated that fire related damage could diminish the capability of safely shutting down the plant, appropriate modifications will be or have been implemented. These modifications are desc'ribed
+ .. . . . .
i ,as part of the individual analysis'. - . The analyses were performed by a team of engineers which was under the supervision of a Senior Engineer in the Nuclear Engineering Department
' of Boston Edison Company. Specialists from various consulting firms and Bechtel Power Corporation, the architect engineer and constructor of the plant, also participated in various phases of the analyses.
The analyses methodology, which was utilized to determine the effects that a postulated fire involving both redundant divisions of shutdown systems may have on shutdown capability, is depicted in the sequence I diagram, Figure *DPR35-15
~~ ~ ~ ~
t I In determining the consequences of a postulated fire in each of the nine fire zones, Figure DPR35-1 and the following assumptions were I considered: A. Assumptions
- 1. No analyzed accident occurs concurrently with a fire.
2. The most severe natural phenomena do not occur concurrently with a fire. -
. 3.
Safety related components failures do not occur concurrently with a fire except as caused by the fire. 4 Abnormal operational transients, as defined in the FSAR, Appendix G, can occur concurrently with a fire. 5. Three (3) plat ; operators will be available to implement the ,. emergency shutdown procedure in case alternate shutdown operations are required as a result of s fire in the CSR. 6. Administra*ive controls for combustibles are being followed. 7. Interim fire protection measures are being followed. 8. The present fire detection and suppression equipment is functioning 9. In regard to alternate shutdown for the Cable Spreading Room, credit is not taken for fire detection and fire fighting systems and personnel for 20 minutes. 10. No credit is taken for non-safety systems except as may be noted and justified. E - I . I ' I-I
3 Method
' A field survey of each fire zone, except 2.10 (Feedwater Heater B), was conducted by BECo personnel to verify tray separation and stacking, fixed and transient combustibles, ratings of doors, walls, penetrations, equipment layout, existing fire protection measures, etc. A field survey of Fire Zone 2.10 could not be conducted at this time because of high radiation levels in the condenser bay area.
To ensure that all cables for safe shutdown systems were identified, BECo
, personnel campiled a list of all safety related conduits and trays for each fire zone and, using an in-house computer program, compared this list to the raceway and cible schedule in order to develop Tables I through VII, " Safe Shutdown Systemd'.
C. Legend. Bechtel Drawings E298-V-1, E298-V-2, E301-V-3, E309-V-4, E328-V-5, E329-V-6, E321-V-7, E333-V-8 and E320-V-9 have been marked-up to show all safety related trays and major equipment; the conduits that are required to effect a safe shutdown have been identified as follows:
- 1. Safety Division A tr'ays and"donduit are identified by a series of
~
~ ~
i dots and dashes ( .
.); associated equipment has been enclosed in a rectangle (I I ).
2, - Safety Division B trays and conduits are identified by hatch marks - - - (////); associated equipment has been enclosed in an elliptical circle ( C ).
- 3. Safety D,1vison X trays and conduit are identified by a series of .
~
short las5es' ~i(M ;~ ~as's'oiiated equipment' has been e1 closed in a circle (Q ) having a serraced edge. Where apprcpriate, BECo' elevation sketches of critical ractway locations are F also indicated on the Bechtel drawings.
._ 10
_m. - w 6* 6 gym 4 A 4't'-- -N*N m- **- -6'"M*
I Tables I through VIII list the safe shutdown systems in each fire zone. Three of the columns in the table pertain to Safety Divisions A, B and I; one of the remaining colu=ns lists Raceways and the final column Remarks. I Equipment / components of the different safety systems required for safe shutdown of the plant, and served by cables passing through a fire zone, are entered in the respective columns. Entries are grouped together under each shutdown system. Heavy lines separate the system rows. To identify the type of cables associated with equipment / components, symbols are i3 entered within parentheses along side of equipment / components. Letter "P" means Power; "C" means Control; and "I" means Instrumentation. Combinations of these letters are also possible. Equipment and component identification can be cross-referenced with the P&ID pertaining to that , system. Applicable P&ID's are included for the convenience of the reviewer. Raceways used to route the cables for equipment / components,which are identified in columns 1, 2 and 3,are entered in column 4. The letters are defined as follows: I u AL, AM - typically means Safety Division A trays. BL, MB - typically means Safety Divison B trays. XL, XM - typically means Safety Division I trays. A930, A372 - typically means Safety Division A conduits. B930, E372 - typically means Safety Division B conduits. X930, X372 - typically means Safety Division X conduits. I - 11 I _ _ _ -
. - ~ . . . - - .
V. ANALYSIS OF EACH FIRE ZONE Fire Zone 1.9 Control Rod Drive Module Area - East The routing of Safety Division A, B and X raceways have been marked-up on Bechtel Drawing E298-V-1. The minimum horizontal and vertical distance between Safety Division A and B trays is approximately four feet. As shown on the drawing, Safety Division B trays run north-south on the east side of the Reactor Building. Tray BS enters at a height of seven feet along the north wall at the staircase access and climbs to Elev. 46'-0" and remains at this elevation till column line: L. At this point, it drops down and becomes two trays, BB and BJ, at Elev. 36'-1" and 35'-6", respectively. BB and BJ end near column line H. Marinite boards, 3/4" thick, are installed below tray BS and between trays BB and BJ. Trays PF, AL, AM, FR and AC are stacked vertically one above the other along the east wa*.1 as shown in BECo Sketch #1 for Section A taken near panel C61 (looking no th). Tray PF is located at Elev. 42'-0" above a ventilation duct. Marinite board is provided between the tray and duct. ' Safety Division X trays are installed between CRD modules at Elev. 38'-6" and rise to Elev. 44'-0" near colurm line H. These trays are horizontally separated from the nearest redundant A and B trays by more than 6 feet at the closcst point between columns J and K.
'~ '
BECo sketches 1 through 4 for ihis fire zone show spatial separation and barriers between raceways. Trays AC, AM, FR and AC have Marinite bosrds installed between them as shown in BECo Sketch #1. Between column lines L and H, Marinite boards are installed in the vertical position between Safety Division A and B trays. Locations between colu=n J and H, where Safety Division B trays (BB and GJ) are run on top of AL and AM, Marinite boards are provided between each tray. The results of the raceway analysis, which are summarized in Table I, { indicate that an unlimited and un=itigated fire in Fire Zone.1.9 involving more than one safety division raceway cannot be tolerated F 12
_.n - - ---- _-;- m .-.- .-. _ _ . _ _ _ I - because safe shutdown would be jeopardized. The safe shutdown systems involved include RHR, SSW, RBCCW, RCIC, HPCI, and ADS. Both diesel generators are also involved. The most likely and serious threat to a cable tray installation would by a fire originating external to the trays. The possibility of a self-ignited fire in Safety l Division A trays propagating to the B trays is neglible because all Safety Division B trays are sprayed with Flamemastic 77 on the top and bottom. I n Attachment (b), " Area Usage Analysis", which was submitted by Reference (e), i 1 i postulated that a 55 gallon drum of oil could be brought through the area to service the Recire. MG Sets. To eliminate the possibility of a fire occur-ring from a 55 gallon drum of oil, station procedures now prevent the . 1 movement of a 55 gallon drum of oil through the area.
- I Consideration was also given to rerouting the present Safety Division B raceways to another area as a means of ensuring their availability in case of a fire involving Safety Division A raceways, but this was found not to be feasible because the adjacent areas (Cable Spreading Room, Feedwater
~
Heater B and Diesel Generator Buildiig)'are all critical with regard to already existing redundant trains. .
**wd_ - e_ -e. -m ,_ ,,,,, ., ,, m M
.a I ""C *
*4 eems. . ,
I en- em 13 I . I I _. .- - - _ . _
I The present defense-in-depth fire protection measures for this fire zone include the following:
- 1. Safety Division B trays, which include Trays BS, BB and BJ routed through Fire Area 1.9, are sprayed top and bottom with Flamemastic 77.
- 2. In view of the close proximity (four feet) of Safety Division A and B trays, south of column L to column H, all Safety Division A trays south of column L are fire proofed top and bottom.
- 3. Safety Division A trays AU and AV, installed east to west along column M below Safety Division BS and XC trays, are fire proofed top and bottom with Flamemastic 77 to eliminate the possibility of a combustible path between Trays BS and XC.
- 4. The following trays, containing PVC cables, are fire proofed top and bottom using Flamemastic 77:
I FG - located between Mi and AC VG - located below VC and AC JF - located below XJ
~~
MN - located below AE MN - located below AC
- 5. All enclosed low level signal trays are provided with fire breaks every 20 feet. l
- 6. All wall and floor penetrations, electrical and nochanical, will be upgraded to 3-hour rating.
- 7. All Safety Division B electrical conduits which are used to route safety systems such as Core Spray, HPCI, RHR, SSW, RBCCW, and Diesel will be protected from a transient fire based on case-by-case analysis I using either a protective wrap around shield which consists of a dry
(.125' - 150" thick) film of Quelpyre Mastic 703B containing a liner of 1" 5 needied Kaowool, ceramic film blankst; an alternate of boxing I 14 I .
. . . . a . . . .. . . . . .
. - - . - - . . ~ ~ ~ - . .
1 grouped conduits is also being considered. Technical data for the former is forwarded as Attachment (A) for your review. This.modifi-cation will be done after approval is received from the NRC for this design. 8. Smoke detectors have been recommended by BECo for this area as part of the commitmtat in SER Item 3.1.L Due to the high ceiling con-figuration, the large volume, and the major amount of raceways routed through the area, special design considerations are being evaluated for selecting the most optimum detector system for this area. The detector system for Fire Zone 1.9, when installed, will Promptly notify plant personnel of a fire, and the s exact location of the fire will be indicated on a local .. . display unit. { 9. Plant personnel have been briefed regarding the safe shutdown systems whichare routed through the area and special precautions are established for personnel access through the area.
- 10. Sealed beam emergency lights, rated for 8 hours, will be installed at selected locations in this area as part of BECo's commitment to SER Item 3.1.5; these lights will aid fire fighting and safe shutdown of certain equipment located in this area in the event of a loss of off-site power or fire in an adjoining area.
11. Steel beam structures and columns in this area are fire proofed for 3-hour rating as part of BEco's commitment to SER Item 3.1.14. { 15 c L ( __ .. .. .-.
- - - - - - - = . _ _ _ _ - - - - -
I Conclusion In our engineering judgement, the fire protection measures proposed or in the process of being completed, are sufficient to prevent, detect, and/or extinguish a postulated fire before it could adversely affect both .I safety division raceways. I I I I .- I - I I I . I I 1 I I ,I l 16 'I
u ,., . O PRELIMINARY CALCULATION SHEET CgARIZATION NO. REV _ DATE ~- p,gpaggogy,$, DATE /b2-77 FINAL REV DATE h Edison CHECKED BY .. APPVD BY DATE DATE
# NO
SUBJECT:
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TAE M SEOMTDR IW ZOM,9 M M M M M M' I i Safety Division A Safety Division B Safety Division X Paceways bmarks l RCIC cooler VAC 202B(C) Trays AL, Ali, All VAC202A (P&C) AY, AC B trays are sprayed, conduits
! VAC204A (P&C) will be wrapped with fire llPCI Unit cooler VAC201B (C) Trays BS, BJ, BB, VAC201A (C) B405, 8413, B406, -
l VAC204C (C) B403, B441 1 vAC704D (C) . j Diesel oil P,P141A (P&C) Trays & Conduits i Loss of these two pumps will Diesel oil PP 141B P&C Trays and BS B651 not affect safe shutdown. j Dic:el A (P) Buried in '
~ ~ ~ ~ '
i (C) floor
; , C103A (P) f, field flash (P) Power feeds for both the }
field pump (P&C) Tray AL, All, AI, diesels <tre located in the '[ j volt set cont. '(C) AC, A1324, A372, floor ducta. Fire in the j A225, A948, A226, atat. aux. compressor (C) zone will not have any effect
; turbo comp (C) A087 on these ducts. To protect l cat.& relay (C) safety division B Diesel control cables from a common
{g fire from Diesel A control cables, trays BS, BB, BJ in the zone are sprayed with Flamemastic 77 (top and . . . . ( Diesel B (P) buried bottom). Conduits R651, and l Control & Field Flash (P) buried B666 will be wrapped with l Aux. Panel C104 flame resistant insulation. {i Fuel Pump (P&C). Volt Set Control (C) Trays BS, BJ, BB, Cov. Set Control (C) B651, B666 . (C) Air compressor (C) Turbo comp. (C) Control Switches (C) Fict . and Relaying (C) Inst. and control (P) I l Innt. Panel Y3(P) Tray AL, A087 i j - l' ll e a
Page 2 of 5 E E ' W ,BL E E SI M WN M EM M FI M )NE M Safety Division A Safety Division a Safety Division X Faceways Remarko '
- , I,
. SSW SSW and RBCCW systems power ! feeds for Safety Division B ll SSW PP208A (C) will be protected from PP208B (C) Tray All, AM, A348, a common fire with Safety
{ M03800 3 A347, A345 Division A systems. Conduits M03801 B1281, B1282,&B1283 will be
! .PS3838A ,
, wrapp_ed ,wi,th, , fir,e re.tardant ,
l . I insulation materials. En-casement in 3-hr. walls is being studied. I: SSW PP 208C(P) Tray XC, XB.&:X255 B14 (J856-J861) (P) B1281, B1282, (SSW P 208D B1283 208E RBCCW Batt. Exh.PP P202D,)E, F Fan B1-J862 (P) Tray AC, A1344, (B15) A1343 (RBCCW PP 202A y 202B 202C SSW PP 208A 208B . . Diesal Oil Transfer PP P141B Batt. Rm. Exh. Fan) RBCCW P202A (C) Tray All, AM, A347 202B (C) A387 202C (C) PS 405B, SC8336 (C) Powar Feeds: D16-D7 (P) iray All, AL (DC) power (RCIC M0220-2 r Fuel Oil PP for Diesel A) D8 (P) (IIPCI-2301-6, 2301-14 B1294 2301-55, 2301-36 MO-3813 (SSW) MO-1001-21 1001-60 - Diesel Oil PP)
- 1 R R. .n U n e r- , u u R R M R P Safety Division A Safety Division H Safety Division X Reccueva Remarks !
RilR PP 203A (P) Conduits 1338 A loss of both Safety 203C (P) A017 Divisions A & B RilR 1001-7A, 7C, 18A)(P&C) A018 must_ be avoided. TE do this j 23A, 26A, 16A ) A1339 Safety Division B trays are t i 34A, 36A, 37A, 43A, Trays & Conduits sprayed (top and bottom) i 43C, 68A (C) with Flamemaatic 77 1001-33A (I) and conduits will be
. SV1001-68A, 95A (C) wrapped with fire resistant H04060A, B (P&C) insulation. Encasement of
& instrumentation conduits is also being reviewed.
RilR P203B (P) Conduits 1281, P203D (P) 1281, B1283 These measures are in addi- ' e j 1001-7B, 7D, 16B, 34B, don to the defuse-h-
; Trays,BB, JB, 36B (P) 1001-43B, 43D, 1301-15, Y4 B405, B407, B409, de@ fM mWh modifications already 1001-18B, 23B, 26B, 37B (C) B408 B2508, B2509.
'104010A B323, B412, B024, committed to by BEco.
'11001-21, 1001-60* -
2- . B277, B352, B2511, B2510, B411, B416, 1001-47 (P&C) g415 8,- u HO-1001-29A, 29B' , Trays XQ, XJ, XR,~' 8 28A, 28B, 1001-19, XC, XB, X260, X256 1001-32, 1001-50, X254, X126, X127 1001-63 x258. x259 Powir Feed
- ~~
B1-B17 Tray A:, A1345 li (1001-43A, 43C, 36A, 37A, 34A (P) l 2301-4, 1001-16A 1001-7C, 7A B6-B20 (P) Tray XC, XR, X130 (1001-40, 1001-29A,
. 29B, 28A, 28B)
- Corn Spray.
P215A (P) A1342, A019 Core Spray System B will be
, H01400-3A (P&C) protected from Division A.
H01400-4A (P&C) AL, AY, AM, AV Tray BB is sprayed (top and i 1400-24A (P&C) bottom) with Flamemastic 77/ 1400-25A (P&C) A346, A387 "B" conduits will be wrapped 3 SV1400-9A (C) with fire retardant insulation l 1400-51A (C) material. CS Control Loop A i I ~. __. _ _ _ _ _ _ _ _ _ _ _ . . _ _
LE SAI IUT E SY E I RE E 1. 'agMf N Safety Division A Safety Division B Safety Division X _ Raceways Renca:ks l P215B (P) Core Spray B1285, See xemarks To: core : spray on i M01400-3B (C) BB Page 3. , 1",00-4B (C) : 1400-24B (C) B407, B409, j 1400-25B (C) B414, B405 CS Control loop B - RCIC ' j Loss of RCIC, IIPCI and ADS P.-2211 - . P-222 . . . . 'e . Trays AM, All, AC, valve control must be avoided. 1301-17 - AL All Safety Division B trays l
- 1301-61 Control are sprayed (top and bottom) :
1 1301-22 with Flamemastic 77. "B" 1301-25 conduits will be wrapped with 1301-26 fire retardant insulation. 1301-48 A348, A387, A226,
. 1301-49 A345, A388, A937, i 1301-53 A371, A372, A225
- 1301-60 i 1301-62 i 1301-50
" 1301-71
,y 1301-7 & Instrumentation - 2301-4 (P&C) A 57 k0 IIPCI Temp. Atuo. Isola : A 47' l tion Loop A A225, A387 f-M02301-3 (C) BB, BJ M02301-5 (C) M02301-6 (C) M02301-8 (C) M02301-9 (C) i M02301-10 (C) l
^
M02301-14 (C) g M02301-15 (C) i M02301-35 (C) ! M02301-36 (C) l P233 (C) P229 (C) i P220 (C) B411, B409, B414, ' llPCI Temp control 4 B406, B577, B413, i Isol. Signal (C) B412, B410 l , IIPCI Turb. Inst. (C) - t ADS ADS Logic ilJ, B408 - - , i I
Page 5 of 5 c a "E F"""OUP ""TEPc '" Fr"r ON g g TgI g g g g Safety Division A Sa fety Division B Safety Division X Raceways Remarka sV203-JA (C) X164, X357, loss of ADS Valve controlo for SV203-3B (C) X165, X415, all three valves must be SV203-3C (C) X356, X365, avoided. Conduits will be : SV203-3D (C) X1153, X406, protected. I ADS Logic X404, X354, i X260, XJ, XC ! D9-3867 250V DMCCC B1294 Not essential for safe I nhutanun i P220-2 (C) Loss will not affect safe , Stn. Line Drn. Iso. Ve AM, AH, A387 shutdown ' A0203-2A (C) Loss will not affect safe A0-203-2B (C) BC shutdown. M01201-2 (C) React. Wtr. Clean- * ' up System. XX M0220-1 (C) XR
.w ,;.., -
A0203-1A-AC&DC (C) XJ XQ . A0203-1B-AC&DC (C)
! A0203-1C-AC&DC (C)
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I Fire Zone 1.10-CRD Module Area - West I The routing of Safetr Division-A, -B and X raceways have been marked-up on Bechtel Drawing #298-V-2. Safety Division B trays run north-south on the west side of the Reactor Building along column 6. Safety Division A trays run north-south between columns 7 and 8 and east-west along column N. Safety Division X tray (XA) I is a continuation of XB in Fire Zone 1.9 and runs east to west along column column N. BECo sketches #11, #12 and #13, for this fire zone, show existing spatial separation and Marinite barriers. Non-safety trays FL and FM, located under-neath Safety Division BH tray, have tray covers; tray FM has solid bottom covers. Marinite boards are installed between non-safety traye and safety division trays wherever they cross as shown in sketch #12 for trays AK and I FO. Safety Division B tray stacks and Safety Division A tray stacks have a minimi=1 horizontal separation of 8 feet between columns, H, J and 5, 6. The only location where these two redundant Safety Divisions cross each other vertically is along column J and 7, and 8. Sectional sketch #12 shows existing barriers. The results of the raceway analysis, which are su=marized in Table II, indicate that an unlimited and unmitigated fire in Fire Zone 1.10 involving
.._ ~= . -. .- _: - -
- - - . .- - - - - - - . - - - - - - .n .-.
more than one safety division raceway cannot be tolerated because safe shutdown
~
would be ' jeopardized.~ The safe shutdown systems involved included SSW, RBccF
' RCIC and HPCI. Both diesel generator auxiliary control panels are also included. '
~ The most likely and serious threat to a cable tray installation would be a fire-originating external to the trays. The possibility of a self-ignited fire in Safety Division B trays,which would propagate to A trays,is neglible because the spatial, separation between Safety Division A and B trays is at least 8 feet horizontally; at the location where A and B trays are routed vertically above each other, both trays are sprayed with Flamemastic l
77. 6 I _ -._ -- 28
- - = - --.
I - l - BECo's " Area Usage Analysis", which was submitted by Reference (e), postulated that a 55 gallon drum of oil could be brought through the area to parvice the Recire. MG sets. To eliminate the possibility of a fire occurring from a 55 gallon drum of oil, station procedures now prevent , the movement of a 55 gallon drum of oil through this area. I Consideration was also given rerouting the present Safety Division A raceways to another area as a =eans of ensuring their availability in case of a fire involving Safety Division B raceways but this was found not'to be feasible for the following reasons:
- 1. the adjacent areas (Feedwater Heater B, Open Area - West Half of RB at El. 51'-0", CRD Module Area - East) are critical areas with regard to already existing redundant trains, I
- 2. the proximity of the RCIC quadrant in the southwest corner
_and.the"EPCI quadrant in the northwest corner of this fire zone. The prerant defense-in-depth fire protection neasures for this fire zone include the following:
- 1. All Safety Division A cable trays located in 71re Zone 1.10 are sprayed with Flanemastic 77 both top and bottom.
I I I 27 - I I . _. _ .-_ _ _ . _
~
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- 2. Safety Division B trays routed along column K as shown in sketch #12, are sprayed with Flamemastic 77.
- 3. Safety Division A conduits A 1343, A1331 and A392, shown on sketch #11, will be safeguarded by the use of Quelcor fire retardant retardant and heat resistant insulation.
- 4. The following trays, containing PVC cables, are fire proofed top and bottom using Flamemastic 77:
I FL - located below BH FT - located between CRD modules ,
- 5. All enclosed low level signal trays are provided with fire breaks every 20 feet.
- 6. All wall and floor penetrations, electrical and mechanical will be I upgraded to 3-hour fire ratings.
~~
- 7. Smoke detectors have been recommended by BECo for this area as parc of the committment in SER team 3.1.1. Due to the high ceiling configuration, the large volume, the open hatch area, and the major amount of raceways routed through this fire zone, special design considerations are being evaluated for selecting the most optimum detector system for this area.
I The detector system for Fire Zone.l.10, when installed, will promptly notify plant personnel of a fire and the exact location of the fire will be indicated on a local display unit. . l l - 1 . 5 28
I . I h E
-s- - - -
- 8. Plant personnel have been briefed regarding the Safe Shutdown Systems routed through Fire Zone 1.10 and special precautions are established for personnel access through the area. Administrative procedures are in effect to control any automobiles / trucks from being brought into the area under the equipment hatch.
- 9. Sealed beam emergency lights, rated for 8 hours, will be installed at strategic locations as part of BECo's commitment to SER item 3.1.5; these lights will aid fire fighting and to use safe shutdown equipment located in this area in the event of a loss of offsite power or a fire in an adjoining area.
~' " 10. Steel beam structures and columns in this area are fire proofed for 3-hour rating as part of BECo's committment to SER Item 3.1.14.
- 11. The truck lock area will be fitted with a hose station during the current refueling outage.
- 12. The Safety Division B tray, which passes through the floor near the Equipment Hatch, is sprayed with Flancmastic 77 on the front and back above the floor.
. 13. The MCC-B18 for Safety Division B is located on the west wall of the fire zone.and has a six-inch water main routed'.above it.
The six-inch line will be supported by seismic restraints which will be installed during the current outage. I Conclusion In our engineering judgement, the fire protection measures _ proposed, , ~ or in the process of being completed, are sufficient to prevent, detect, and/or extinguish a postulated fire before it could adversely affect both safety division raceways. _
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M M W M M M M M M M- M M M M a& P Ofg y q q TABLE II - SAFE SHUTDOWN ,S_YSTEMS IN FIRE ZONE 1.10 ' Safety Divslon A Safety Divslon R Safety Divslon X Raceways Remarks I D7 (P) Loss of 125V DC }fCC D7 will not (RCIC seal Vac P 221 jeopardize safe shutdown i seal Cond P222 , l M0220-2 i ; M01201-5 All, AK A050 Diesel Gen A Fuel Oil Pump 4
; W 3808, M01301-17, :
1301-61, 1301-22, l 1301-25, 1301-26, 1301-48, 1301-49 l 1301-53, 1301-60,
- l. 1301-62) l: D12 (P) BG. BX a..... 017 could be fed from D8 back-up battery charger. t Pl (M02301-6, 2301-14, located outside the area 2301-35, 2301-36, B1180 j f q' 1
'O M0-3813, M01001-21, 1001-60, Diesel Oil Fuel pumo)
MCC815 (P) i (1250C Batt ChrgerDil Loss of power feeds to both i MCC B15 and B14 cannot be RBCCWP P202A tolerated as they feed redundant 2028 SSW and RBCCW pumps. Safety AC,'AK Al130, Division A and B trays are 202C A1331, Al343 SSWP P 208A located on two sides of the SSWP P 2088 area. A fire involving both Diesel oil transfer divisions is very unlikely. Pl414 M03800, 3801 Besides, Safety Division A VEX 104A) trays in the area are sprayed (top and bottom) with Flamemastic (P) 77. MCC Bg4 j (125V DC Batt. Charger i 014 250V DC " ' Dl 3, ; RBCCW P P202D ;
; P202E
, P202F '
l :
fe 5 1via E A Sa y Di o a E ks SSW Fump Uzouu P268E "A" Division conduiCO will he._ t Diesel oil transfer wrapped with fire retardant 141B M03800, MO-3805 B1281, BG insulation material. VEX 1048) 01282, 8034 C B17 is located in j 0 se B' Aux Panel C106/. $,undant g 9, llPCI U/C VAC 201A VAC 201B fi!R/CS V/C VAC 204C .; 204D M01400-38, 1400-4B 1400-248, 1400-25B _
.{
1001-78, 1001-7D B1283, BN BG i 1001-188, k001-168 1001-348, 1001-36B 1001-438, 1001-43D l 1301-16, MO 4010A, MO-4010B Panei Y4. M04083 Safety Division A, SSW pump AK, All A040 control cables are sprayed with SSW Pump P208A (C) A032 Flamemastic 77 both top and i P208B (C) bottom. Conduits A040 and A032^
, M03800, M03801 (C) will be protected from Safety
- PS -3828A (C) ,
l ' Division.B raceway. .' SSW Pump P2080 (C) il Bil, BL Trays & SSW Pump P208E (C) Condults '[.I MO 3806, M03085 g (C) j PS 3829A (C) SSW Pump P208C (P) XA, Xl56 - ' I 8BC(W Pump P202A C ' P202B C Safety Division A. RBCCW pump
! P202C C c ntr 1 cables are protected All, AK & .
! PS 4050, SV3836 C A040, A039 using Flamemastic 77 and fire i
'4 retardant wrapping for conduits, RBCCW Pump P2020 C Bil, BL P202E C P202f C , j M04083, PS f SV3835 PS 4008 C t t
~
i BG, BX / Loss of Y4 panel will not affect ! S&RilR "B" Test at (check valve-Pane 1903 I ' Panel C-1 & ilPCI inst. - i
M M M M M- M Mg g g g g q Safoty Division B Safety Division X Raceways Remarks Safety Division A /
-- ADS Valves A,B,6C available l C X166 outside the area. I ;, SV203-3C '! couc riorm. Unarger 013 (P) BG, BX,B1180 Loss of 250V DC will not affeet safe shutdown. l llPCI Seal Vac P223 f P220, P229 .
l
- M02301-3, 2301-5
- 2301-8, 2301-9, 2301-10. 1001-47) BK. ,
Ali, AK, AS, A038, Loss of both oil pumps will not Diesel oil pump (Pl41 P&C)A A039 affect safe shutdown., 1 Diesel oil pump Pl4lB (P&C) BG, BK, viesen ben A Aux panel Loss of both Diesel aux, panels C103, must be avoided. Safety Division Gen. A volt Set (P&C) ' All, rays A045, A044 A cable trays are sprayed with Contron,- Gov. set t. Flamemastic 77 top and bottom. control met & relayint Conduits will be wrapped. ' fuel oi1*pudp (C) Gen.B Aux Panel C (P) BN, BG, BK I Gen B Fuel oil w u pump X107 (P&C)
.I <
RCIC U /C VAC 202P. PAC) 88 " " " ' " AC' All' AK RCIC or llPCI Pump Room must be VAC 202B - avoided.to" ensure operAttonlof
~
HPCI U/C VAC20lB(P&O) BG A BN VAC201 A(P&C) BG, BN, BT pumps. This is done by fire RiiR U/C VAC204D VAC204C(PAC) P# I"8 " Y " " '"Y" ' , in the area, t C;7.(C) I
! t RilR Pump P203B(P) Loss of Safety Division B,; RilR P203D(P) system components will not i M01001-78 1001-7D ' B1289 01290 jeopardize safe shutdown.as ;!
M01001-188, Bil, BU, BG, Safety Division A RilR is avail- j M01001-348 BN, BL able outside the are'a in Fire F M01001-16B (PAC) Zone 1.9. l 1001-36B M01001-438 M01001-430 M04010A, M040108 [ M08001-21, M01001-60 [
~
M01001-47 4
- RiiR Logr. circuit B (c l g g i-688, 1001-95B(c [
M01001-298, ICJ1;280 XA
L__J R V M-TABLE II - SAFE StillTDOW SYSTEM IN FTRE ZONE 1.10
! Safety Division A Safety Division B Safety Division y Rarievavs Remarks RCIC Pump P221 (P6C) All, AK-A050, A041, Loss of bo:h RCIC and i P222 A391, All, AK, A047, filPCI will not affect i
{ M01301-17, 1301r61 (P&C) A303, A048, A2521, : safe shutdown as there i 1301-22, 1301-25, A044, A302, A046, Iare three ADS valves 1301-26, 1301-48 A2520, A2504, A045, ' available outsida this 1301-49, 1301-53 A2514, A039, A040, Fire Zone to ensure shut-1301-60, 1301-62 A2522, A2503, A2506,
' down of the plant throuFh RCIC Instrumentation A2940, A475, Ali, AK
) low pressure systems.
and turbino control A877, A879, A871 RCIC Isol. Valve Logica (C) M01301-16, (P&C) f Auto Isol Signal (C) BT, BN, BL, Bil, BU, BT, NB { llPCI Temp Auto AC, AS, A874, A740, ;
$ Isol Loop A (C) A861 .
{'
, M02301-6, M02301-14 (PC) BU, Bil, BN, VT, W .
M02301-35, M02301-36, ' IIPCI gland Seal Vac P 223 Auc oil P299 - I gland seal cond P220 M02301-15, 2301-3, (P&C)
, M02301-5, M02301-8 t
H02301-9, M02301-10,
! IIPCI Temp Control Iso (C) i Signal Steam Line Drain VV SC2301-64, SV2301-65, SV2301-29, SC2301-
- 30 llPCI Cond Drain Valve CV 9068A CV9069B i
ADS ADS valves SV203-3A, SV203-30 (C) X166 SV203-3B and SV203-3D availt.ble in Fire
, Zone 1.9 6
"' ' W " " " M.E F SAEllinE SE I!ME E 1.E E E E E E Safety Division.A_ ._____ Safety Division B Safety Divsion X Raceways Remarks
, Core spray Pump P215B Bil, BU, BT, BN Core Spray System A H01400-3B, 1400-4B (C) available outside in H01400-24B, 1400-25B Fire Area 1.9-Testable ck bypass (P&C)
SV1400-9B SV1400-51B BT, Bil, BP, BU & BN and Control Toop B (C) l H0220-2 (P&C) Loss of this equipment
' will not affect safe shutdown t
1 i U l i l
I Fire Zone 1.11 Open Area - East Half of Reactor Building
, The routing of Safety Division A, B and I raceways have been marked-up on Bechtel Drawing E301-V-3.
Safety Division A Trays run east-west between columns M and N. Safety Division B trays are routed in the south-north direction near Column 17 and then in the east-west direction along Column M. The horizontal distance between these two Safety Division trays in their east-west routing is at least 6'-0". There are no Safety Division X trays in this fire zone but X I Division conduits are installed. Marinite boards exist between trays BA, l j RA and BD. Tray NA has been sprayed, top and bottom, with Flacemastic 77 since it contains PVC Cables. BECo sketch #1, Section Aa, shows the existing barriers and the distance between redundant tray divisions. BECo skecthes #1 and #2, for this fire zone, show the spatial separation and existing Marinite barriers for these two redundant raceways. , ____{ The results of'the raceway analysis which ark su=narized in Table III, indicate that a fire in Fire Zone 1.11 involving more than one safety division raceway cannot be tolerated because safe shutdown would be jeoparized. The safe shutdown systems involved include RER-and . I CS. The most likely and serious threat to a cable tray installation would be a fire originating external to the trays. The possibility of a self-ignited ^ fire in Safety Division A trays which would propagate to B trays is negligible because of the six feet horizontal separation and because all the A trays and B trays in this fire zone are sprayed, top and bottom, with Flamemastic 77. BECo's " Area Usage Analysis", which was submitted by Reference (e), postulated that 55 gallon drum of oil could be brought through the area to service the Recire. MG sets. To eliminate the possibility of a fire occurring from a 55 gallon drum of oil, station procedures now~ preven't'the movement
. _ _ . . . .. . ... -- - - ~~ -'
I of a 55 gallon drum of oil through this area. t 38
~-
T _ .
~~~ --
Rerouting of either safety division cables outside Fire Zone 1.11 to pre-clude damage by a common fire is not feasible for the following reasons: Residual Heat Removal System The electrical cables for RHR logic circuits for Safety Division B are run between Panel C2206A located in Fire Zone 1.12 and Panel C933 located in the Cable Spreading Room. Rerouting these cables outside Fire Zone 1.11 would mean routing these cables through Fire Zones 1.10 and 1.9 located a floor below. Both these fire zones are critical from the point of view of safe shutdown. For Safety Division B RHR valves, specified in Table III, the control cables are run between MCC B18 located in the Reactor Building at Elev. 23' (CRD area west, Fire Zone 1.10) below Fire l Zone 1.12 and Panel C-930 located in the Control Room. Rerouting [ these control cables would necessitate routing them through Fire
~
Zones 1.10 and 1.9 which are critical areas from the stand point of safe shutdown. . CORE SPRAY SYSTEM For Safety Division B Core Spray valves, 3pecified in Table III, electrical control cables are run between 480V MCC B18, located [ 9 39 s. 1
-
- _ , + - - _ -
_ __ _.. ._ _ _ _ _ _. . . . ~ l in Fire Zone 1.10, and Panel C903 located in the Control Room. Electrical Control Cables for Core Spray Control C. up B are run
. 1 between Panel C2206A, located in Fire Zone 1.12 (west of Fire I Zone 1.11), and Panel C933 located in the Cable Spreading Room.
)
Rerouting these cables outside Fire Zone 1.11 would require them to be routed through Fire Zones 1.10 and 1.9. which already have i a larger number of safe shutdown systems located in them. The present defense-in-depth fire protection measures for this I fire zone include the following:
- 1. Safety Divisions B and A cables trays are sprayed, top and bottom, with Flamemastic 77. The horizontal separation of more than 6 feet between both safety division cable trays ,
precludes the propagation of a fire between redundant raceways.
- 2. All enclosed low level signal trays (LLS) are provided with
- l fire breaks every 20 feet.
- 3. All wall and floor penetration fire stops (electrical and mechanical) will be upgraded to a 3-hour fire rating.
- 4. Trays containing PVC cables are fire proofed, top and bottom, using Flacemastic 77.~ These include tray NA installed below Safety Division tray BD.
- 5. Sealed beam emergency lights, rated for 8 hours, will be 1
installed at strategic locations as part of BECo's committment l to SER item 3.1.5; these lights will aid fire fighting and to l use the safe shutdown equipment located in this fire zone.
- 6. Conduits _A353 and A351 shown on BECo sketch #1 will be protected from a common fire with tray stack BA by installing a 3/4" Marinite board interposed between the conduits and tray as
~
shown by dotted lines on the sketch. ihe board will - ~ ~~
~
L-be large enough to have an over hang of at least one foot. 40
-- i 1
'7. Recire. MG set area on the west side of the floor will have an additional sprinkler system installed to cover the whole area.
Conclusion In our engineering jddgement, the fire protection measures proposed or in the process of being completed are sufficient to prevent, detect and/or eicinguish a postulated fire before it could adversely affect both safety olvision raceways. I I I l . ^' I . I l l l I I I p . 41 u J
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BECo FORM X5251 43
M M U M M M M M M M M M M M M M M M M Page 1 of 2 TABLE III - SAFE SilUTDOWN SYSTEMS IN FIRE ZONE 1.11
?
SAFETY DiVlS10N A SAFETY DiVlS10N 8 SAFETY DiVlS10N X RACEWAYS REMARi(S >l RDCCW Mo 4083 (C) Tray BA i I . HPCI U/C VAC201B (C) Trays BA, BD : ,l VAC20lA (C) l RHR U/C VAC204C (C) m . RHR tl/C VAC2040 (C)
, RilR-Logic A (C) Trays AA, & A356 '
Loss of both RllR system . I' l (Reactor Pressure A359, A358, & components must be avoided. h i Dryweli Pressure, A1163 This is accomplished by fire [ ' l Reactor Level) proofing trays BD, BA, and AA with'Flamemastic 77 top RHR M0 1001-70 (C) Tray BD, BA and bottom. 1001-7D (C) 1001-18B (C) i 1001-168 (C)
! 1001-34B (C) - --
'l$ 1001-36B (C) f* 1001-43B (C) 1001-430 (C) MO 4010A,M040108, (C) -
/-
M0 1001-21,fol001-60 ' M01001-47, (C) RHR circuit logic B (C) (Reactor Pressure,
- Drywell Pressure, Reactor Level)
~
L Core Spray M01400-24A crays AA & A353, Loss of core Spray Systems l A351, A359, A358
' M01400-25A A and B must be avoided (PAC) A356, & A1163 This is accomplished by CS Control Loop A (C) spraying Safety Divisions A and B trays with Flame-Core Spray M01400-3B (C) Trays BA, BD mastic 77 top and bottom.
I M01400-4B (C) . M01400-248 (C) ' . p
t TABLE III - SAFE SHUTDOWN SYSTEMS IN FIRE ZONE 1.11 Page 2 of 2 l SAFETY DIVISlotl A SAFETY DIVISlotl B SAFETY DIVISIOfl X RACElfAYS REMARK 9 .- 7 M01400-25B(C) Trays BA,&BD ., L l t CS Control Loop B (C) - t l Trays AA, & A358 j llPCl Temp Auto isola.. Loss of these llPCI and I (- loop A (C) _. _ RCIC turbine controi~ " l ntti Muz3ui-o tw _irays on,sou cables sill not affect
- l 2301-14 (C) safe shutdown. -
2301-35 (C) F 2301-36 (C) . Turbine Gland Seal VAC , P223 (C) ' Turbine Aux. Oil Pump ,
, P229(C) i ' " " Gland Seal Cond.
P220 (C) M02301-3, M02301-5, (C) M02301-8, M02301-9, , l , M02301-10, llPCI Temp ! u Control & Isol (C) ' f . SignaljTurbine instrum- 'i ' i - entation (C) f RCIC Turbine Control ! (C) AA and A358
}
! ADS logic Tray BD ~
Loss'of these cables will'.
- f ADS Sol. Vv Actuation (C) X357, X355, X123, ADS lodic (DrywelI liigh XI120, XI124 Pressure) (C) n
~
. i
e l Fire Zone 1.22 Reactor Building - Closed Cooling Water Pump Room "B" The routing of Safety Division A, B and I raceways have been marked-up -
)
on Bechtel Drawing E309-V-4. i Safety Division tray BC runs north-shout (column 4M-4P) and east-west along column M. Safety Division A trays run north-south along Column 3. Marinite boards are installed between trays AA and EB and also between DB l and BA. Tray DB does not continue into Tray AA as shown in Bechtel Drawing E309. BECo sketch #1, for this fire zone, shows the ' routing of critical conduits All6 and All8 in relation to trays BC. BECo sketch 2, for this fire zone, shows the trays above MCC B14. The results of the raceway analysis which are summarized in Table IV. indicate that a fire in Fire Zone 1.22 involving more than one safety l division raceway cannot be tolerated because safe shutdown would be jeopar-
~
dized. The only safe shutdown system involved is the SSW. The most likely and serious threat to a cable tray installation would be a fire originating
~
external to the trays. The possibility of a self-ignited fire in Safety Division B trays which would propagate to Safety Division A trays is neglible bacause Safety Division A trays will be sprayed with Flamemastic 77. I Base [onBECo's"AreaUsageAnalysis"whichwassubmittedbyReference(e), it was postulated that one gallon of lube oil could be brought into the area for maintenance on any one of the three pumps. The extent of a fire from a one gallon lube oil spill cannot be accurately determined because 1 of the large area volume, ventilation pattern and the various pieces of equipment (heat exchangers, pipes, etc.) that are installed in this area. To protect tray BC from a fire resulting from an oil spill, Marinite boards will be installed on the bottom of the tray in locations above all three l pumps (P208D, P208E, and P209F). Rerouting of conduits All7 and A118 outside Fire Zone 1.22 was considered but it was found not feasible
~ ~~ for two ' reasons. First, une utidergroliEd.~ ducts, wtiich' provide the
. , ......w,',..., .. ' ~ ~. ~ 2 " a * ~ ' ~ * * ~ ~ ~ ~ ~ ~ ~ ~ * .
~
- I e
_ _ _ _ ._2 . . - - m !I routing of power cables (including All7 and All8) to equipment in the ,I Intake Stz3 cture . extend _s_ from the_ northwest wall of Fire Zone 1.22.,_ .And , l ! second, there are no spare ducts available. -
- - ------.--- -- -_. - -_ _ _ . _ = - - - -_ . _____ __
The present defense-in-depth fire protection measures for this fire zone include the following: I 1. Smoke detectors will be installed throughout the area as part of BECo's committment to SER Item 3.1.1. I BECo is' considering the use of graphic display, printer and CPU system through the plant. When. installed, the system udl pin-point to plant personnel, the exact location of a smoldering fire that may originate in this area.
- 2. A.3-hour fire rated door will be installed between Fire Zones 1.22 and 1.21.
I 3. Plant personnel have been briefed regarding the safe shutdown systems routed clirough the area and special precautions are in effect for personnel access into the area.
- 4. Seal beam emergency lights with 8-hour capacity will be installed in this area for fire fighting purposes in case of loss of power.
- 5. Marinite boards will be installed above RBCCW pumps to protect Safety Division B trays located above the pumps.
I Conclusion In our engineering judgement, the fire protection measures proposed or in the process of being completed, are sufficient to prevent, detect and/or extinguish a postulated fire before it could adversely affect both safety division raceways. I , I 47 lI ._ .. _ _ _ .. - . _
O PRELIMINARY CALCULATION SHEET fy,'lZATION NO.
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PRELIMINARY CALCULATION SHEET i. CyAplZATION NO. 7 REV _ DATE 2 l FINAL
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REV DATE h CHECKED BY W DATE N Ed15on, APPVD BY DATE l
SUBJECT:
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' I , i i g i i t i! I I i : i l SEco FORM X5251 49
. m m M M M M M M M M M M M WPagof b g M TABLE IV - SAFE SilUTDOWN SYSTEMS IN FIRE ZONE 1.22 Safety Division A Safety Division B Safety Division X pnceways Remarks B14-D12 (P) Trays BD, BB, Bf180 Loss of B14.will not J861-Bl4 (P) 0033, 8034, B145 6 . affect Safe Shutdown i
Bl46 .as redundant BIS is VEX 104B (PAC) BD, BA, BC BD, BA, BC, 8151 ' located in Fire Zone 1.21. B157. B152, 01037 SSW Pump P208A (P) AA, All7, All8, Allo Loss of SSW System for l P?088 (P) A032 Safety Division A and
; SSW Loop Control Safety Division B must be l Belays (C) avoided. Tray AA will be j
S ~ Em p 208D'(Pac)
~'SW BB, BD, BC, BA; B104 sprayed with Flamema'sti'c
- SSW Pump P208E (PAC) '
8037, 8036, 0037 77 top and bottom. MO-?RG6, M03805, B136, B035 Conduits All7, A118 and M03813 (PAC) A032 will be wrapped with
;* RRW Innn B Control (C) fire retardant insulation.
-l SSW Pump P208C (P) XI10
!E RBCCW Pump P202D (PAC) BA, BB, BC, BD, Bl10 RBCCW System A ava11a P202E (PAC) B037, B109, Bl08, ;. -P202F (PAC) 01174, B107, 8036, Jn Fire Zone 1.21
- j M04083 (PAC) 0102, B103, Bl86 ,
panna SVTA35 (C) Diesel Oil Pump Pl418 Loss of P141B will not (PAC) BA, BB, BD, Bil80, affect safe shutdown. , t ' M0 1301-22 - All2 Loss will not affect safe shutdown. . M02301-6 (PAC) B2516, 8037, BIO 5 ADS and RilR systems are M02301-14 (PAC) 8144, B2517, B2519 available from outside ~ l M02301-35 (PAC) Bl18, B143, B219 this fire zone.
; M02301-36.(PAC) 003,5, B106, B2517, 6 nn?7. nn?s. nn?6 -
i ' D13 (P) ss will not affect safe BD, BA, Bl84, Bil80 shiirdown. - l: Int ~. Struct. AA, A142, A366 These conduits and tray Exh. Fan VEX . are to be protect <:4 from 104A (PAC) - f a fire. j
I Fire Zone 2.1 Switchgear Room B The routing of Safety Division A, B and I receways have been marked-up on Bechtel Drawing E328-V-5. The results of the raceway analysis, which are summarized in Table V, indicate that a fire in Fire Zone 2.1, involving more than one safety division raceway, cannot be tolerated because safe shutdown would be jeopardized. The safe shutdown systems involved include RHR, CS, HPCI, I and RCIC. The diesel generators are also involved. The most likely and serious threat to a cabic tray installation would be a fire originating external to the trays. The possibility of a self-ignited fire in Safety Division B trays propagating to Safety Divisions X or A trays in negligible because: (a) Safety Division X trays are sprayed with Flamemastic 77 and, (b) Safety Division A raceways are enclosed by a 3-hour fire rated barrier. The above fira protection modifications would preclude the possibility that two safety divisions are damaged by a common fire. BECo sketch #1, for Fire Zone 2.1, shows the redundant Safety Division A trays in the fire zone. Consideration was given to rerouting the A Division conduit and trays outside of the area; however, the structural configuration of the Turbine Auxiliary Building made it impossible to reroute the A Division trays and conduit and still remain consistent with cli' c~onstraintsimposed e 'by the Amendment 34,
- High Energy Pipe Break Analysis. s The present defense-in-depth fire protection measures for this fire zone I include the following
- .
l 1. The enclosure of A Division circuits by a 3-hour fire rated barrier.
- 2. Administrative procedure for control of combustibles.
I . _ _ - . _ 51
- 3. Installation of a hose reel station on the north wall of Fire Zone 2.1 (west side).
[ .
- 4. Installation of a hose real station immediately outside of the
( entrance door (east side)'.
- 5. The spraying of all cable trays containing PVC jacketed cable.
- 6. The upgrading of all electrical cable penetrations to 3-hour fire rating.
[ 7. The up;rading of HVAC penetrations to 3-hour fire rating.
- 8. All exposed structural steel has been fireproofed to at*.ain a rating ef 3 hours.
[ 9. Additional smoke dets cors will b6 added to the existing system.
- 10. a sviding fire breaks every 20 feet for all enclosed trays.
Conclusion
. t.
{ In our engineering judgement, the fire protection measures proposed, or in the process of being completed, are sufficient to prevent, detect, and/or [ extinguish a postulated fire before it could adversely affect both safety division raceways. [ [ [ [ [ [ c 52 L
,. . . . . .- -. . - - - * =
9' O PRELi h ARY ^~ CALCULATION SHEET Ng'lZATION NO. REV DATE _.
=' pagpaggo sy MemfATE N" T* U FINAL REV DATE h CHECKED BY DATE DATE I /
Edn~ son APPVO BY ' d conna
SUBJECT:
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I i l i I I I g BECo FORM XS251 53
ia r--- , a rm rm rm rm rm rm rm rm rm v m rm m gn m m 1 . TALBE V - SAFE SilUTDOUll SYSTD S IN FIRE ZO'IE 2.1 i SAFETY D1VlS10tl A SAFETY DiV1S10tl B SAFETY DiVlS10fJ X A OR X RACFWAYS Rema tic s A574 L sa f A&B 125 VDC f Auto Transfer Switch 8125VDC lost A to X B division Bl25VDC lost 125 VDC back X161, XLO7P Normal 125V DC - Olvision A
- 8 division up battery charge XLO8P,XLO9P, remal.ns available.
XI154 82 Bus Transfer from CSR is t!6 load conter transfer XLO7P, XLO8P, II""N3* p,
! control from BI or B2 XLO9P,X163, X401 . X101 Xil50, Xil51 XLO7C . l Bus A5 Bus A6 ~
AR01, AT01, A1329 A1332 i Bus Bl Bus 82 B6 load conter power A267,A268,A269
*- from A switch gear Al319 I A Diesel Generator B Diesel Generator A1321, A1322 h02$isI$$I'mhi$$h$Sy*enbio$10g$II) o 3 conduits in 3-hour barriers.
tie to A5 bus Al324 -l Loss of both RiiR Systems must be l RHR Pump and RilR loop B AT01,AR01, Al327 avoided. Trays AT01 and AROI are logic division A . A1338,A1339,Al340 encioned and all conduits enclosed in Al341,A1342,A1343 3-hour barriers. i h , A1344 i Core Spray power Core Spray loop B A1318, AT01,AR01 L sa f both Core Spray Systems must ! power and control be avoided. Trays AT01 AR01 and ..l and logic division A B division A1318 are enclosed in 3-hour barriers. HPCI instrumentation A IIPCI instrumentation AR01, AT01 Loca of both IIPCI and RCIC must be
~ '
avoided. Protection is carried out for trays AROI and AT01. ! ( , , t 4
. 5 l
u u _ cs; g Pa g of g
! TABLE V - SAFE SHUTOOWN SYSTEMS IN FIRE ZONE 2.1 s
j __ _ _ . _ .
! ADS power supply A ADS power supply ARol, AT01 loss of ADS Protect raceway l lost division B AR, AT i l
250 VOC back up XLO7P,XLO8P,Xioop loss of 250 Loss will not affect i battery charger XLIOP, X105 VDC back up safe shutdown.
- r-h a r nn r-
- I Protect raceway j RCIC instrumentation AT01, ARDI loss of RCIC ,
AT, AR _ i I I j . i 9 I ll l t t O,- {
I Fire Zone 2.2 - Switchgear Room A I The routing of Safety Division A, B and I raceways have been marked-up on Bechtel Drawing E320-V-6. Fire Zone 2.2 contains B and X Division conduits and equipment. The X Division equipment consists of 125V DC backup battery charger (swing) and 250V DC backup battery charger (b) . The X Division conduits contain circuits which serve both 125V DC swing charger and the 250V DC backup charger. The loss of 250V DC backup charger is of no consequence as the 250V DC system is still available through the 250V DC normal charger. The loss of the swing 125V DC battery charger D14 is acceptable because B Division 125V DC still remains operable. The 125V DC "X" swing backup charger may be disconnected from the 125V DC B Division by a breaker I located in the lower Switchgear Room B preventing a fault condition of the X Division backup charger from impairing the B Division 125V DC system. Conduits X 1150 and X401 contain the transfer control for swing bus MCC B6 located in the Cable Spreading Room. Loss of these conduits would not affect the ability to manually transfer the feed to B6. Presently, all X Division circuits are routed in conduits. The loss of the entire Fire Zone 2.2 A and X Division cable and equipment would not impair the ability to attain a safe shutdown. . The present defense-in-depth fire protection measures for this fire zone include;. the following:
- 1. Mministrative procedure for control of combustibles.
- 2. Additional smoke detectors will be added to the existing system.
- 3. Relocation of the CO2 hand hose reel closer to the entrance door.
- 4. Installation of a water hand hose reel station immediately outside the station door.
- 5. The spraying of all cable trays containing PVC jacketed cable.
g Se
i
- 6. The upgrading of all electrical cable tray penetrations to 3-hour fire rating.
- 7. The upgrading of all HVAC penetrations to 3-hour fire rating.
- 8. Exposed structural steel :has been fire proofed to attain a rating of.
3-hour fire rating. Conclusion As stated above, the loss of Fire Zone 2.2 would not affect the safe shutdown capability. I I
~
I l I I I I I I 57
~
w=~~*= e--~- --- ..m.- - . . . ______m_._
I e Fire Zone 2.10 - Feedwater Heater "B" a The routing of Safety Division A, B and X raceways have been marked-up , on Bechtel Drawings E320-V-7 and E321-V-8. The results of the raceway analysis, which are su=marized in Table VI, indicate that a fire in Fire Zone 2.10, involving more than one safety division raceway, cannot be tolerated because safe shutdown would be jeopardized. The safe shutdown systems involved include HPCI and RCIC. The most likely and serious threat to a cable tray installation would be c fire originating external to the trays. The possibility of a self-ignited fire in Safety Division B trays propagating into Safety Division A trays is negligible bacause all A trays will be sprayed with Flamemastic 77. No combustible materials are stored in this fire zone and access through the area is controlled by Radiation Work Permits because of the high I radiation level.
~
,j 1
I The only safe shutdown cables of concern in this fire zone are the cables used for RCIC Turbine Instrumentation such as for ECM Control Box, signal 1 l l 1 1 converter and flow transmitter. These are routed through conduits A475 and A940. A475 is shown routed along Safety Division A trays (column ll-G) . for " Plan Below El 37'-0" on Bechtel Drawing E-320-V-7, Rev. E2. A940 is routed near column ll-H for " Plan Below El. 23'-0" on Bechtel Drawing i E-320-V-7. The actual spatial separation of these two conduits from k Safety Division B raceways could not be verified by a site tour.due to high levels of radiation in the area. A detailed site survey will be { carried out during the current refueling outage to evaluate whether these conduits can be rerouted outside the area. In case rerouting is , I found not to be feasible, these conduits will be protected
~
~
by wrapping them using Quelpyre Mastic 703B for the duration of their run. l I The defense-in-depth fire protection measures for this fire zone include the following: - l l . _ _ _ - _ _ 58
. -- ,; j- ._. .. _ _ _ . . _ _ _ .. _._ .-. =-_-- -- .---_.-- - . -_-
I . 1. An automatic sprinkler system is available to suppress any fire. Portable fire extinguishers are also available in the area. i
- 2. PVC cables routed through this fire zone will be sprayed with l Flamemastic 77; enclosed trays will be provided with fire breaks every 20 feet.
Conclusion During the current refueling outage, an investigation will be made to determine if critical Safety Division A cables can be rerouted outside the area. If not, the modifications described above will be implemented. It is our engineering opinion that the firs protection measures proposed and existing, are sufficient to prevent, detect and/or extinguish a postulated fire before it could adversely affect both safety division raceways.
.I I
I I - E 1 I I . l 59 lI
M M W M M* M M M M M M- M .M .M M M M M M l Page 1.of 2 l TABLE.VI - SAFE SilUTDOWN SYSTEMS IN FIRE ZONE 2.10 l I l. SAFETY DIVISION A SAFETY DIVISION B SAFETY DIVISION X ' RACEWAYS REMARKS - 3 r . Bl5-D11 (P) AA . 125VDC Back-up Charger D7-016 (P) AX available I B14-012 (P) , BE 125VDC Back-up Charger l available
; .SSW P2080 (C) BE SSW A System available l l P208E (C) ,
t ,M0-3806, M0-3805 l t SSW toop B control Rel(C) i
~
l RBCCW Pump P202D (C) BE - RBCCW A available l P202E (C) , ; P202F (C) RBCCW Loop B Control (C) '
;g Y4 (P) BE <
RBCCW A available : l D.G.A. tie to A5 (C) AW AW tray is at Elev. 41'-0". j Neutral Grounding (C) < Breaker A509 r power fIoId ; can be closed manually at AS. Turbo assist start
- nInnai (c)
! Diosol B inst & Control (P) 81, BH, B267, - l Il&VSecondaryContent(Ci 81, BH j j ! Isolation Valves - - 1 RilR logic B (C) Bil RilR A available M01001-78, 1001-70, M01001-438, 1001-43D , j sv imi-68n.sv 1001-950 _ RCIC gland seal cord AP
- P221(C) XA01301-50, , ' A934 i XA0130l'-71 (C) i i A940 Turbine instrumented l . i A475 (EGM Control Box ' '
. t power signal converter , !
')
M E M E E' E M M.E M SAMIUTM SY ST ~ RE - 2-- g ag g f g g ,
. Safety Division A Safety Division B Safety Division X -
Raceways Remarks l
- RCIC M01301-16 (C) BH Loss of IIPCI and RCIC Systems
_ Temp. Auto Iso. signal should be avoided as there are .s only two ADS valves avaf,lable [ outside this Fire Zone. Ynree
' ADS valves are required to ' jl effect safe shutdown of the f i . HPCI M02301-5 (C) BH, plant using LPCI in the absence ' ,l M02301-3 (C) of IIPCI and RCIC. !!
I M02301-36(C) M02301-35(C) HPCI temp control &(C) , B901 {
- i l-
!Tsolation Signal I SV2301-64,SV2301-94 i
! SV2301-65,SV2301-7
' t
' SV2301-29,SV2301-30 1
' l CV906bi.,CV9068B
l A0203-2A, (C) B l , BH, Loss of these components will l
- l. A0203-28 B088, B089 not affeet safe shutdown. '
A0203-2C
' A0203-20 SV203-3C X166 . .SV203-3A i' cn
~
Ads Sol Valve actuate X406 . SV203-30 SV203-30 'ava i I abi e i o
! Bl6-Dl3 ,
BE . Loss of 25C VDC System will not 250V normal charge affect safe shutdown. h ,
, Core Spray i BE l Loss of Core Spray valves will t . SV1400-9B'('" '
{ .not affect safe shutdown as pl
~
SV1400-51B (C) ; ! ,- Safety Division A Core Spray j Components are available. ,_-l l ,
) -
l i
' l
{ , _
. ( . - -
i , i 1 I
) .
I Fire Zone 3.2 Cable Spreading Room The routing of Safety Division A, B and X raceways have been marked-up ( on Bechtel Drawing E-333-V-9. Because of the large number of safe shutdown systems and raceways.which are routed through this fire zone, BECo cot:mitted to providing an_ alternate shutdown capability in the event of the loss of the Cable Spreading , Room. The proposed design for achieving this capability was submitted to the. NRC by Reference (c). Additional information was requested by Reference I (d) in order for the staff to complete their review. This information l will be submitted as soon as it is available. The present defense-in-depth fire protection measures for this fire zone includes the following: 4
- 1. All PVC trays are sprayed with Flamemastic 77, top and i bottom.
- 2. All enclosed trays are provided with fire breaks every 20 feet.
- 3. The underside of the lowest trays have been sprayed with Flamemastic 77.
- 4. Exposed steel structures have been fire proofed.
- 5. Electrical power conduits routed along the north wall of the CSR have been enclosed by a 3-hour fire rated barrier.
- 6. Access to the CSR is controlled by an administrative procedure which requires at least two men for entry.
- 7. The access door on the east wall to the corridor has been 1
upgraded to a 3-hour fire rating.
- 8. An additional hose is provided in the adjacent corridor.
i I
- 9. The present smoke detection system will be expanded.
I 10. All electrical and mechanical penetrations will be upgraded to a 3-hour fire rating. 62
=- -- _ _ . _ _ _ _ _ _ _ . _ . . _ _ . _. _ _ _ _ _ _ . . . _ _ _- __. _ _ _ . _ .
I
- 11. All fire dampers will be upgraded to a 3-hour fire rating.
l Conclusion Wen the alternate shutdown modifications and fire protection measuves are completed, it is our opinion that a fire in the CSR will not have any affect on safely shutting down the plant. I I , I ' I . I .-: . . ! I I I I I I I I . I I __ _ - _ - _ 43
l I g e Zone 3.5 Vital Motor Generator Set Room I The routing of Safety Division A, B and X raceways have been marked-up on Bechtel Drawing E320-V-10. Safety Division B trays run west-east iri the northern part of Fire Zone 3.5 and north-scuch in the eastern part. There are no Safety Division A or X trays in this area but Safety Division A and X conduits are installed. Marinite boards are installed between Safety Division B trays BF and BE and between BR cad KG. Section AA, BECo sketch #1, shows the routing of A2501 and A086. Section BB, BEco sketch #2, shows the panel Y3 and con-duit A027 Conduit A1143 is not required for safe shutdown as it is used to: Radwaste System and H2 Analyzer System. The results of the raceway analysis,,which are summarized in Table VII, l indicate that a fire in Fire Zone 3.5, involving more than one . .
-y e safety division raceway,cannot be tolerated because safe shutdown would be jeopardized. The only safe shutdown system of concern is the RHR which is supplied from Panel Y3.
Panel Y3 is supplied from 480V MCC B17 which is located in the Reactor Building at Elev. 23'-0". Panel Y3 provides control feeds for panels C1, C903, C904, C89 and C220. The #1 breaker in the panel feeds
~ systems which"are not ' essential for safe shutdown of the plant. ' ~~
The U breaker provides feed to panel C904 for Isolation System for:
- 1) Steam Line Inboard Valves, 2) RHR Inboard Isolation Valves 1001-50, 1001-63 and 1001-32, and 3) Reactor Water Cleanup System Inboard I Valve 12-1-2. Isolation valves will fail close on loss of offsite power. Valves 1001-50 is required for Shutdown cooling Mode which has been addressed as part of BECo's analysis for a postulated I
64
..._ ~, n _ . . . - - - . - . .. .. . . _ - _ _
I
- - , s _
fire in the Cable Spreading Room. Valve 1001-50 will be provided with , alternate power to enable it to be open for shutdown cooling mode. For a fire in the Vital MG Set Room, the isolation switch provided I for this valve per the CSR analysis / modifications will be used. None of the other isolation valves is requiredsto effect safe shutdown. Consideration is being given to rerouting the A Division conduit and panels outside the fire zone. The present defense-in-depth fire protection measures for this fire zone include the following: .
- 1. Cable trays BF and BE, shown in sketch #2, will be sprayed I with Flamemastic 77 throughout their east-west routing.
- 2. Photoelectric and ionization detectors will be installed to ..,
provide early warning. This will provide the route of fire / smoke propagation in the zone.
- 3. A hose station will be provided outside the fire zone in the I stairway.
- 4. PVC cable-trays have been sprayed with Flamemastic 77.
- 5. The enclosed trays will be provided with fire breaks every 20 feet. ,
- 6. Portable emergency seal beam lights, rated for 8 hours, I will be provided to light up panel Y3 and Vital MG Set Room I breaker panel E23 as part of BECo's committment to SER Item 3.1.5. Access to Vital MG Set Room through th'e stairway will be illuminated using an 8-hour emergency light.
- 7. Wall penetration fire stops will be upgraded to 3-hour fire rating. -
I - l I - . . - - - . 65
Conclusion In our engineering judgement, the fire protection measures, when completed, are sufficient to prevent, detect, and/or extinguish a l postulated fire before it could adversely affect both safety division raceways. lI iI 4 1 4 4 I j
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M M M M M M M M M M M M M m m IM16 m m i I TABLE VII -SAFE SIIUTDOWN SiSTEMS IN FIRE ZONE 3.5 l I
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' SAFETY DIVISION A ' SAFETY DIVISION B SAFETY DIVISION X RACEWAYS REMARKS 125V DC Charger D12 (P) -
BE 125V DC MCC DB (P) ', B1294 j HCC B14 (P) l' j HCC B18 (P) l SSW Pump l'208D (C) . BE l SSW A'available P208E (C) i 'outside zone HO-3806 (C) , 3 HO-3805 (C) . , < SSW Loop B Control i l' ( I; Relays (C) RBCCW Pomp.P202D (C) BE l RBCCW A available P202E (C) i -outside zone. P202F (C) . as RBCCW Loop B i Control (C) I f - Panel Y3 (P) ! l
' A087,A086l
- 1) CS & RilR System "A" ,
Testable Check & Bypass i l Valves - Panel C903 i i .
- 2) SSW Loop A, RBCCW, TBCCU '
{ j
'f l . Loop A controls and ,
t i l
- 3) RCIC Instrumentation ! , ,
; :l Only R11R 1001-50 li Panel C904 i
- 4) RIIR System Isol. Valve i ! is required for *';
Control Steam Line A ; - safe shutdown. /' u Inboard Valve Control. ! ! j-Panel Y4 (P) CS & h1(R , i BE and B961I System "B" Testable Check ; l , and Manual Injection valves - i t-
; panel C903 SSU Ioop B, RBCCW ! , ,
j Loop B & TBCCW Loop B Controls !
- i C1 & IIPCI Instrumentation i 1 :l
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! M M M M M M M M M M M M M M M Mgem 2M M TABLE VII - SAFE SilUTDOWN SYSTDIS IN FIRE ZONE 3.5 ,
SAFETY DIVISION A SAFETY DIVISION B ' SAFETY DIVISION X RACEWAYS h- REMARKS Diesel Generator B Tie BR Conduits B Diesel A A6 (P&C) 1279, B)83, B085 available, B084, F081, B1279 B1163, B082 l
. RHR. Pump P203B (P) 1289, 1290, BE& RilR system P203D (P)
B379 available ogde of RHR Instrumentation (P) Core Spray Pump P215B (C) i BE, B1285 .l CS System' SV 1400-9B, SV1400-51B (C)- > available SV 1400-6B (I) ; outside zonco HPCI Instrmeentation (P) l BE, B379 RCIC avail- able. 250V DC Normal Charger y BE, B1294 Not re uired l C g 250V DC HCC D9 (P) !' B1293 l shutdown.
- m. __. _ . . _ _ . __ _ - -
-~
VI. SCHEDULE FOR COMPLETION OF MODIFICATIONS All of the committed fire protection modifications will be completed in accordance with the dates stipulated in References (a) and (b). Modifications to penetration seals cannot be started until we receive a response from the NRC concerning Reference (f). Wrapping of critical conduits with Quelcor cannot be comnenced until we receive a response from the NRC on. t.iie techni;al acceptability of Attachment (A), included herein. Information on rerouting of cables will be submitted as soon as our investigations have been completed. The fire protection modifications (alternate shutdown capability) to the Cable Spreading Room are currently in progress. However, a response from the NRC corcerning the technical acceptance of Reference (c) is required prior to initiating a final cut-over to the existing safety systems which would be affected by a postulated fire in the Cable Spreading Room. VII.
SUMMARY
The cafo chutdown analyses indicatc ~ that the most serious areas of concern are Fire Zones 1.9, 1.10 and 3.2. To ensure that a postulated fire in these areas does not adversely affect the safe shutdown capability, the following measures have been instituted in addition to the defense-in-depth fire protection measures already described in each analysis. I
- a. Plant personnel have been educated and trained on the criticality
} and location of raceways in the fire zone.
- b. The procedure for the control of combustibles is being rigidly.
L enforced. -
- c. Additional fire extinguishers have haen provided in the fire zones.
L 71 ? ._. . _ . .- ~ . - . --.
I I d. ' Tours and surveillance of the fire zones are made daily.
- e. Continuous fire watches are provided while any work is being performed in fire zones which require a cutting and welding permit.
- f. If a fire, in Fire Zones 1.9,1.10 or 3.2 is judged not to _ _ _ _ _
be i= mediately extinguishable, the unit will be shut down as rapidly
- I as practicable.
I ' E 1 I , I .~'. I I I l I l I I l . 72
. - - . . -.<w.. .--~ . .. - - .. . . . - . . ,. -
.- -- - . - . - - - _~ . . . . .
I VIII. REFERENCES (a) The NRC's Fire Protection Safety Evaluation (SER) dated December 21, 1978 including Amendment No. 35 to Facility Operating License No. DPR-35 for the Pilgrim Nuclear Power Station Unit No. 1 (b) BECo Letter to NRC (J. E. Howard to T. A. Ippolito) dated 3/30/79, File Reference #79-61 and BECo Letter #79-130 dated 7/6/79 from A. F. Corry to T. A. Ippolito. (c) BECo Letter of 10/4/79, File Reference #79-195, with attachments, Andognini to T. A. Ippolito. (d) NRC Letter of 10/22/79, Ippolito (NRC) to Andognini (BEco) (e) Meeting held in Washington, D.C. between NRC, BECo and Bechtel personnel on 5/16/78. (f) BEco Letter dated 10/10/79, G. C. Andognini to T. A. Ippolito, I ' File Reference #79-204. Title, "Information on Penetration Seals".
~'
~
1 I l l I I I 73 I - - . . _ -. - .. . _ __ . _. . -
I - IX. ATTACHMENTS (A) Quelcor Technical Data, one page, dated 4/27/79. (B) " Area Usage Analysis" prepared by BECo for PNPS #1 and submitted to the NRC during the meeting held between NRC and BECo persotatel on l I I May 16, 1978. I ! I .. I I I I I . 74 l
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.,: y. . a.:a ATTACHMENT A
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RIGID CONDUIT - Fire Retardant and Heat Pesistant Insulation. . A new concept in the fire protection of metal conduit passing over or adjacent to grouped cables in trays has just been developed and evaluated.
.150") film of A protective wraparound shield consisting of a dry (.125 Quelpyre Mastic 703B containing a liner of a 1/4" needied Kaowool ceramic fiber blanket.
The Quelpyre Mastic 703B is the fire retardant coating which is being used to protect grouped cables in trays and in pourable form, to make air seals and firestops at penetrations. Inof stacked cable fire tests at Sandia Laboratories, It is free of asbestos, I it has proved to be the equ- the best coating tested. halogens and low in smoke . val during combustion. this wrapr ound Quelpyre Mastic 703B fire shield have just been I Burn tests o' completed. The' protective shield with liner were wrapped around a 3" x 1/4" aluminum conduit with the Kaowool blanket against the conduit. The shield was wrapped tightly A caulk of Quelpyre I with a 1/2" overlap and held in place with steel tie bands. Mastic 703B was applied keep the overlap from opening. The conduit was thereby insulated against heat with
.150" Alla of Quelpyre Mastic 703B.
a 1/4" Kaowool liner and .125"
- 5 Using the atandard time-temperature curve of ASTM E-119, a 10" length of wrapped conduit was exposed to a 40,000 B.T.U. propane ribbon burrer in a specially cor.structed draf t f ree coebustion chamber. The temperature readirgs of the flame I et point of impingement and on the inside of the conduit were as follows:
FIME FLAME TEMP. INSIDE ALUMINUM CONDUIT 1250 F. 700 0 F.
~ 10 Min.
20 Min. 13500 F. 135 0 F. 30 Min.- 1550 F. 180 F. I 40 Min. 60 Min. 1600 1650 1730 F. F. 205 0 240 2650 F. F. F. 75 Min. F. 0 1775 F. 280 F. 105 Min. F. 1760 280 120 Min. F. 1750 285 F.
. 180 Min. F. .
As predicted, the heat appears to have been insulated frem the met'al conduit by the Kaowool blanket, while the Quelpyre Mastic 703B dry blanket material acted cs a fire barrier. Although no information is available on dissipation of heat inside the conduit while energized, it is assumed that the thin (1/8") coating will permit heat to I radiate upward through the coating wrap. 4/27/79 _. I_--.-- .
~ '~ -w~~_.___,_ . _ _ . _ - _ _ _ _ _
~ * ' *
* - - . _ . . ....n~ --- - - - - - - - - - - - " ~ * - " --
Attachment (B) I AREA USAGE ANALYSIS Analysis Criteria a) The plant is assumed to be at power. b) The systems required for safe shutdown during a fire event coinciden,t with a single failure in the fire protection system and no accident . are: Onsite emergency power distribution system l HPCIorRCICorADS(onevalve) RHR or Core Spray SSW RSCCW c) Transient combustibles are assumed to provide the initial - fuel source for an expos 6te fin in a particular room. Depending upon the configuration and location of permanent combustibles in the room these combustibles may become involved in a transient combustible initiated fire. If so, these permanent combustibles will be considered in the fire hazard analysis calculations. d) Combustible and flammable material quantity analysed is based g on the actual equipment needs and allowance for maintenance excess.
- a. Actual traffic patterns through the plant for maintenance personnel ,
. transporting the combustible source were considered to determine the inpact through different plant locations.
Analysis Results The results of the analysis, using the above listed critaria, are presented I in table A. Area Usage. Analysis-Transient Combust'bles. These results indicate the maximum amount of combustible etterial, in transit through g' or in use in the areas investigated, to bt used for postukating a " reasonable exposure fire."
.e e-.. . + + . _ . .-- - .
M M M ' i' 1 tai 1LE A ' f AREA ilSAGE ANALYSIS - TRANSIENT COMBUSTIBLES. MAX. i' . EQUIP QTY. TRANSIENT REMARKS _ i, , EQUIPMENT COMBUSTIBLE _ CAPACITY _ ANALYSED _ ACCESS _ TEM NO. BLDNG . EL Limited
- 10 GAL , ,
RHR and Core Spray PP's Rm.,A Lube 011 - (1) ** Reactor (-)17-6 Lube Oil ( 2) 5 CAL Limited *
- 1.2 RCIC Pump Room Limited ** i ,
Reactor (-)17-6 RCIC Pump Mezzanine:-V1vt. Lube Oil (2) -
.5~ GAL ' } 1.7 1.5 Reactor 2-9 and Instr's. Grease - 5 LB ** jb -
2-9 CRD Pump Rm. Herzanine: 5 GAL Limited Reactor (3) U q: 1.8 RHR Val ves and Ins tr. . . . . .Lube. . . Lube Oil 011 (4) 55 CAL Unlimited * ,h
' 1.9 Reactor 23'-0 CRD Modules-MCC's. Safe. BECo.investi!
gating use I; East Cable Trays and RilR V1vs.
~
of Fire Ret tardant 01'
$5 GAL Unlimited
- BEcoinvestil i.
N Lube Oil (4) gating use o' 23'-0 CRD Modules-HCC's Cable 1.10 Reactor - Fire Retard-! ant oils l l ;i Unlimited
- BEco investil ~l' 1
Lube 015 (4) 55 GAL 51'-O Safe. Cable Trays and 5 GAL gating use o
, 1.11 Reactor ' Panels. Core Spray and 011 Fire Retard-East .
RHR Vivs. ant 011s i I' , BEco investi; o 011 (4) 55 GAL Unlimited
- 51'-0 Safe. Cable Trays and . gating use e l 1.12 Reactor ' of Fire Reta :. . ;
j .
. ant oils t .
Unlimited *
- I hBCCW Syst. A Surge Tk. Area Lube 011 (Sh . 2 GAL .
91-3 2 CAL Limited Il 1.16 Reactor Lube Oil (6J Reactor Aux. 3-0 RBCCW Pump Rm. B - 2000LB Limited Once/5 Yr. , 1.22 Standby Gas Treatment Charcoal l 1.23 Reactor /Turbn. 51-0 System A A8 , Filter f; Limited
. Aux. Lube 011 - (7)- 2 GAL ;'
Reactor Aux. 3-0 Demin. Wtr. & Condensate ; 1.27 transfer Pump Dur{ng shut , LubeOfI (8) Limited 9-2 Drywell Interior. Recirc., down period i , : ,l 1.30 Reactor' , oil change. external oil #
~
piping or pr* R ssured lines a Unlimited .j 011 (9) 1 GAL Turbine 51dg. 23-0 Swltchgear Mm. 8 None Limited Dead End. Rm 2.1' Switchgear km. A None - 2.2 - Turbine BIdg. 37 0 'l
E E ' W M M m m ;gf HAX. ' ! l TRANSIENT EQUIP. QTY. , REMARKS l EQUIPMENT COMBUSTIBLE CAPACITY ANALYSED ACCESS. TEM NO. 8LONG. Q. f Grease !. 10 LB Limited 6-0 to 47-0 Fdwtr. Htr. A 2.9 Turbine Aun. Grease - 10 LB Limited 2.10 Turbine Aux. 6-0 to 47-0 Fdwtr. Htr. 8 Paper - 10 LB~ Limited ** l Radwaste & Cntr1.37-0 Main Control Room f10) $ GAL Limited 3.1 Fan Room 2 Lube Oil ** 3.4 Radwaste & Cntr1.51-0 Lube 011 1 GAL Limited Vital MG Set Pa. Saf. Panel ** 3.5 Radwaste & Cntr1.23-0 ' Salt Service Water Pump Lube Oil fl9)) l 11 1 GAL Unlimited , 5.3 Intake Structure 21-6 . , 4 GAL /PP jl
- 1) RHR, C.S. pp ;
RCIC PP. 011 capacity - 2.5 GAL /PP (i 2) CRD PP. oil capacity - 5 GAL /PP I i f Recifc PP.MG set - 730 GAL / Unit ld ii I l ))/
')
STD. By Liq. Entr1. PP-RBCCW PP 2 GAL /PP 1 GAL /PP - l
/ Demin Wtr or Condensate Transfer PP - 1 GAL /PP '
d Recirc PP Opper bearing -47 GAL /PP -
- Vital M. 2.5 GAL / Unit.
GAL / Compressor 10 HVAC Units 11)) Salt Service llater Pump - 1 GAL /PP . I i Lhited Access - Maintenance when required ! . i i Unliatted
- Access - Traffic of personnel & suppites routeLubricating oils in Transit to Recirc.' PP. MG ;
cils are stored or used on EL. 23'-0" or 51'-0" in safety related areas ' co 011 changes are low frequency events. i i { I l lt
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E M M m m m m m e e m I.I , EVENT 28 EVENT 28 EVENT 28 GENERATOR I I LOSS OF STARTUP l l LOSS OF 345KV i I.. TRIP ) TRANSFORHER ) SUPPLY ) i STATE F f ALL STATES j ALL STATES f , e STATE F 1 LOSS OF T/G / STATE,F T/G /\ T/G j
- j. J AUXlLiARY j UNLOADED / T/G LOADED LOADED ~ / \ UNLOADED' j TRANSFORMER A-C SUPPLY
, l PLANTED OPERATION:
i ( [ AUTOMATIC TRANSFER TO POWER . } OPERATION i i STARTUP TRANSFORMER ' -
. SUPPLY
; YES NO A u, STANDBY f AC AVAILABLE AC TO POWEP.
ALL BUSSES gg P S F tf '
;+ PLANNED OPERAYlCH:
PILGRIM
'b !j COOLDOWN RESTORE HUCLEAR POWER STATION AC POWER FINAL SAFETY ANALYSIS REPORT 21 Protection Sequences for Total less of OfIsite a< Power FIGURE G.0-36s 6
g E . EVENT 28 TOTAL LOSS i 0FF-SITE AC POWER ' [
. ALL STATES ,
i0 STATES STATES l B,D,F ALL STATES if C,D,E,F lf II ~ U l s REACTOR INITIATE' SCRAM PRESSURE STAND 8Y FOR CORE PROTECTION ON LOSS OF RPS COOLING SEE RELIEF .i
+ H-G SETS OR AC POWER FIGURE G.0-36c SYSTEM TURBINE TRIP ' SYSTEM 71 SYSTEM 64 88 5 F '
S F S F y - CONTROL ROD INSERT 6 RIVE SYSTEM ROD
! PRESSURE 58 RESTORE l
, S F RELIEF AC POWER
; p 18 -
21 l SCRAH ' 1 l 37 PILGRIM .! NUCLEAR POWER STATION je FINAL $/,FETY ANALYSIS REPORT - s
- Protection Sequences for tow Los of Ofidte ed: Powr FICURE C.0-36b
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[ ANblE STATtCN W Fi4E HOSE ST AT10N 5 AMPLE C00LER t Y EJECTOR OR EDULTOR
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CONTROLDALVES SCLF CONTAINED MECHANICAL AUXILIARIES "'5T*Wi tT CC TROL MR ,
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M tal CONDEw5 ATE DEwiie(Raq}KR 515 ti ?. s u DemoTts HIGH om Low VAR!a6Lt CouDITioM AlaRW ledi4 CONDEN5 ATE 0tuiu-REUw REGgge gi$; it.T.1 "
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- B aC' ion atags ' I &LL Sorth060 Walve 5 ARE SuCatiIN ot Litf AGl%D. 4 P0iliions 981 DEntoTES Sottuoit f5 408WatLT tistPt.2tD
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