ML20138M829
| ML20138M829 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 12/19/1985 |
| From: | Corbin McNeil Public Service Enterprise Group |
| To: | Adensam E Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8512230177 | |
| Download: ML20138M829 (12) | |
Text
{{#Wiki_filter:I Public Service Electric and Gas Company L Corbin A. McNeill, Jr. Public Service Electric and Gas Compan, P.O. Box 236, Hancocks Bridge.NJ 08038 609 339-4800 Vice President - Nuclear December 19, 1985 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission 7920 Norfolk. Avenue Bethesda, Maryland 20814 Attention: Ms. Elinor Adensam, Director Project Directorate 3 Division of BWR Licensing
Dear Ms. Adensam:
CONTROL ROOM HABITABILITY HOPE CREEK GENERATING STATION 4 DOCKET NO. 50-354 Pursuant to discussions with NRC on Ocotber 30, 1985, con- - cerning control room habitability, PSE&G hereby submits the attached response to each of the concerns identified. We trust.this information will resolve the ACRS open item related to loss of all control room ventilation. Should you have any questions in this regard, please contact us. Sincerely, \\\\ I){ Attachment l 8512230177 851219 PDR ADOCK 05000354 p PDR
Director of Nuclear 2 12-19-85 Reactor Regulations C D.H. Wagner USNRC Licensing Project Manager R.W. Borchardt USNRC Senior Resident Inspector
n 1 ATTACHMENT I Page 1 of 7 ITEM l-NRC TELECON - CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 NRC' Concern: " Indicate all assumptions used to develop the control room temperature rise curves provided in the 10/1/85 submittal, and describe analytical model used."
RESPONSE
l' -The~ transient ambientLtemperature analysis for Control . Room 5510 and-Electrical Equipment Room 5302 was completed by using'the Bechtel. Standard Computer Program ME204-Room ' Heat-up (RMHTUP). The program' analyzes room ambient air heat-up generated by internal equipment and other heat sources, and indicates that without-ventilation air, the room-air temperature increases with time. The program is valid for any homogenous room enclosure material with
- a. surface emissivity similar to that of concrete.
.The. analytical model and assumptions used in the program are as follows: A. The room is modeled as an enclosed space bounded by the same thickness of walls, ceiling and floor. The -various wall thicknesses were' calculated to provide an equivalent thickness. B. The different adjacent room temperatures were calcu-lated to an. equivalent temperature. C. The room volume is corrected for the volume occupied by the. equipment and likewise, the room area is corrected for the area covered by the equipment. D. Only one half of'the concrete wall thickness is con-sidered as a heat sink for each room, the other half is for the adjacent room. m E.- The air temperatures in the adjacent spaces / rooms is considered as remaining constant'. 1F. The heat generated within the subject room is con-sidered as being constant. G. Heat transfer between the space and'the adjacent rooms is calculated based ~on the room ambient and wall temperature differences. =
-a. ATTACHMENT I Page 2 of 7 ITEM 2: NRC TELECON - CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 NRC CONCERN: " Provide additional temperature rise curves for inside cabinets and panels, indicating ' delta T between ambient control room temperature and temperature inside cabinets and panels; indicate all assumptions used in developing the curves."
RESPONSE
,The actual operating temperature for the majority of the control room panels have been measured in the field. The attached control panel load summary provides a listing -of:all control room panels with their heat loads and their temperatures as measured in the field. These measurements have been analyzed to yield the minimum, maximum, and average temperature rise'for two cases. The first case is the normal. panel ~ condition with the panel doors closed. The second case is with the panel' doors open. The: average temperature rise.(delta T between inside panel and ambient) will remain constant for each panel provided the panel heat load does not change. In most cases the panel temperature rise is on'the order of 10 to 15 degrees F or less. ~ Heat-up values for inside' cabinets and panels is determined by adding the panel average temperature. rise to the attached control room heat-up curve. o P .y- , - + r. m-r- .-a ,w w. w ~n-y
g p ~ Page 3 of.7' ATTACHMENT I p - ITEM.3: NRC TELECON - CONTROL ROOM HABITABILITY,. OCTOBER 30, 1985 L NRC CONCERN: -" Commit to development of emergency operating procedures and training in the use of these procedures, if.such actions as-opening doors-and installing temporary fans will be utilized .tx) mitigate the effects of' loss of all ventilation to the control room." I -RESPONSE: The actions described in.the response to Item 4, that is opening control panel doors, positioning portable fans in the control room boundary doors, and operating the control room exhaust fans'if available, will be implemented via-control room alarm response procedure OP-AR.ZZ-019. A malfunction or loss of control room supply ventilation is annunciated in the control room by the overhead annunciator alarm window ~10C800-E5.Bl. Operator training in the implementation of: the above actions will be included in the first annual operator requalification. training cycle. a. e .2
~. n.e : ,f-1 II o ' ATTACHMENT 1 Pagef4 of 7 1 i? ITEM- ^4: NRC TELECON CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 s -{: ~ NRC CONCERN: '" Assess the effectiveness of any alternate: l cooling method:to.be-utilized."
RESPONSE
m.- LThe-following; actions will be taken to reduce the heat rise,in: the scontrol-room 'if a ' loss of all1 control room
- ventilation occurs
- .
J -1. .The1 control. room panel doors will be opened thus. allowing additional. cooling to the panels. While this does 4R not' reduce'the control. room heatEload or change thel room heatup-curve, it does. lower the average heat
- n rise 13f.each panel'by an average of 3.8 degrees F
.(see/the control panel load summary in.the response to Item 2). In addition,'the maximum (hot spot) temp-erature of each-panel is lowered an average of 4.4 degrees F.with hotter panels having-a greater temperature -reduction;.This. action will1be taken within thirty minutes of the lossaof all ventilation.
- (
-2.- The: control room: boundary doors will be opened,.and . temporary portable fans will be placed in-the door .waysoto induceLcooling air from the service area corridor ny into.the control room and allowing.it to exit.to the 4 diesel'andJwing. area of the auxiliary building. .One fan:will be-positioned in double door #02-leading to corridor.3504 with the fan blowing into the control D+- room fromithe service area corridor. The other' fan. ~ ~ -will be placed'in door'#10C-leading to. corridor 5525 .withJthe fan blowing into the corridor.from the control-
- room.
'In addition, the control room' doors Nos.-09,- "'10A, and 10B:will be' opened.. Approximately 6000 CFM jx Lcooling.. air"from the' service _ area ventilation system Eat'approximately 80 F to help cool the control room -willcdelay'the time required to reach 10'4 F to at .least:24 hours. p.3 -- ~
- 13. :
Ifithefcontrol-room exhaust fans are operational (lAV-3' 4021& 1BV-402), one of them will be started. This will induce an additional 2500 CFM of cooling air into the control room:from adjacent spaces. These actions will be impAemented in control room alarm i: 1v ; response, procedure OP-AR.ZZ-019. S w 1 or . !G
ATTACHMENT I Page 5 of 7 _ ITEM 5: -NRC TELECON - CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 s " Indicate whether it:is expected that control NRC. CONCERN:. room instrumentation will have been damaged as a result of the loss of all ventilation event'. Will-instrumentation have to be ~ replaced after such an event?" -RESPONSE: It is not expected that control room instruments will be damaged or that their accuracy will change by a temporary . temperature excursion of'the control room ambient to 104 F. Since the' gathering of field data-concentrated on panel hot-spots, the delta T's found are considered the most conservative conditions that would exist. A review of the' temperature design limits, the control room equipment and the~ field temperature data revealed that the worst-case delta'T existed with the-Bailey control panels when the doors were closed. The functional temperature design limit for Bailey equipment-is given as 140 F for a 24 hour period.. Adding the worst case delta T of 18 F (ignoring 27 F^as unrepresentative) to a control room ambient of 104 F-yields 122 F which is the maximum temperature the Bailey equipment would see. Since 122 F is much less than 'the 140*F functional limit, it is highly unlikely that any damage will occur to the Bailey equipment. The design temperature limits of the remaining essential control room panels are: GE-120 F; NDT Intl.-135*F (8 hours); General Atomic-131 Fz & Rockwell-120 F (see the attached control -panel load summary for internal temperature rise for the approximate panels).
If ATTACHMENT I Page 6 of 7 J ITEM' 6: 'NRC TELECON - CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 NRC CONCERN: " Verify'that control room ventilation system is of sufficient capacity that when the ventilation system comes back on-line it will immediately begin to remove the heat built'up and prevent any further temperature rise-(i.e., must demonstrate that qualification temperature values are not exceeded due to the duration between the time ventilation is restored and the point where heat input is effectively. removed)." -RESPONSE: -The control room ventilation system has sufficient capacity 'to prevent further temperature rise in the control room after it is restored. As seen from the attached control room heatup' curve, the control room temperature six hours i after loss of ventilation cooling is 102.8 F and the ambient air temperature rise gradient between six.and eight hours after. loss of ventilation cooling is about one degree F per hour. Within 15 minutes _after the system is restored to full capacity, the control room ambient air temperature will' fall to approximately 87 F. The air temperature will slowly drop to 76*F as the system removes the normal heat load plus the stored heat resulting from the room heatup event. Within 24 hours, the ventilation system will remove all stored heat and the control room conditions will be returned to normal. i s
F ATTACHMENT I Page 7 of'7 ITEML,7:- NRC TELECON - CONTROL ROOM HABITABILITY, OCTOBER 30, 1985 ~NRC' CONCERN: " Account for temperature rise inside the cabinets (local hot spots)."
RESPONSE
The field; temperature measurements provide indication of fany local; panel hot spots. Each panel was visually reviewed prior!to placement;af thermocouples to establish potential hot spots. Thermocouples were then placed within close proximity of any potential hot spots such as transformers, . power supplies,Lheavy duty. relays, CRTs, lights, etc. to generate worst case conditions. The attached Sample Data Collection Sheet-is'an example of thermocouple placement. in a panel. The maximum panel temperature difference is 34.3*F in panel 10C651B'where the temperature sensors were placed near a CRT and a light bulb. The average temperature for this panel is 27.8 F. -This value is considered a conservative
- indication of panel hot spots.
- u
'e
CONTROL PANEL LOAD
SUMMARY
05-On-85 PA5E I WCW $. NEAT PAuft TEMP 91FFERE4CE (F) PMEL TEMP OlFFEMUCE (F) MI TENP AVS TEW [ 8!MENSIONS (Fil HEAT MNStif uttN 000RS CLOSED uttu 000R$ OPEN REIUti!0N REIOCTION 00E TO DOE TO ,-l PAqEL VOLUME LO40 (ITUH LOCATI~2 146 I MSCRIPI'OR FRONT SIK HE!6Hi (F13) (NATTS) h III MIN MAI AV6 MIN Mt M GPEN DOORS OPEN BOORS REMH5 . -................................................................... m............................................... m............ m... m..................................... SHIFT SUP GF(CE 00C647 SMITT SUPV COM CONSOLE 8.00 3.00 4.00 96.00 160 5.69 No FIELD TEMPERATURE DATA TEMP's EIPECTED TO K L0u (LOW HEAT MNSlifl 4 j 5509 00C648 SHIFT SUPV MONtf0R CONSOLE 8.00 4.40 4.00 140.00 350 0.48 M0 FIELD TEMPERef0RE CATA TEr*5 EIPECTED TG K LOW (LOW HEAT MNStif t MAIN CCTROL RM 10C604 CLASS IE RAD MON INSTR CA8 4.50 3.00 7.50 101.25 2000 67.42 5.3 18.8 11.5 3.2 14.6 8.6 4.2 2.1 PMEL AV6 5510 10C604 6.2 16.3 ta. 4 4.2 14.* 8.0 SECTION 1 g"/vit. 10C604
- 4. 4 21.2 12.5 2.1 14.5 9.2 CECTIONS 2 & 3
@ytue( JK605 SW MONITOR CAO 2.50 3.00 7.50 56.25 500 30.34 4.0 21.2 13.0 -0.1 11.1 5.5 10.1 7.5 v j r IK607 f!P CONI 4 MONITOR CA8 4.00 3.00 7.50 90.03 700 26.54 -2. 8 7.4 2.0 -4. 4 4.2 -0. 6 3.2 2.6 I 10C600 PouER RANGE NEUIRON MON !!.50 3.00 7.50 281.25 3600 43.61
- 0. 9 21.1
- 8. 9
-l.0 16.7 3.3 4.5 5.7 PMEL M 0.5 11.5 8.4 0.7 it.4 4.9 uCT 0N A NDT 10C608 0.8 21.4 8.3 -1.6 11.5 2.1 SECTIONS B & C /4/L 10C600 1.0 22.5 10.1 -2.0 24.1 2.I SECil0NS 0 L E IK608
- IK609 RP5 Plv 113 L0Elt VERT 88 15.00 3.00 7.50 337.50 2775 28.06 7.0 13.l f.9 1.8 7.2
- 4. 6 5.1 5.2 PEL M hh 12.9 15.7 14.4 3.1 11.1 6.9 SECTIONS A-C 10C609 B.9 22.4 14.7
- 4. 8 10.7 7.9 EC110NS B-E 10C60*
IK610 CONI R00 TEST INSTR CAI 2.00 3.00 7.50 45.00 200 15.17 4.8 t.3 0.5 -2.6 -0.1 -0.9 1.4 1.4 10C611 RPS PIV 2n4 LOGIC VERT to 15.00 3.00 7.50 337.50 2775 28.06 7.0 13.1 9.9 1.8 7.2 4.6 5.9 5.2 PHEL M (MTA TMEN FROM PMEL lE609) 10C635 H8 MON A/8 INSTR CAI 4.00 3.00 7.50 90.00 1000 37.92 0.1 9.8 4.5 -2.1 5.7 0.7 4.1 3.8 Jt636 RA0 MON C/8 INSTR CAO 3.00 4.00 7.50 90.00 1000 37.92
- 2. 7 10.6 6.7
-1.5 7.2 2.0 3.4 4.7 10C649 OPENTORS MONITOR CLW90LE B.00 2.33 4.00 14.56 400 18.31 NO FIELD TEMPERATURE DATA TEMP'I EIPECTED TO M Lou (LON HEAT MNSlift fiK650A MIN VERTICAL 80ARDS 17.45 3.00 7.50 312.70 1596 13.87 -2. 7 5.1 1.0 -3.7 4.1 0.2 1.0 0.8 10C650B ' 9.20 3.00 7.50 207.f 8 850 14.01 0.0 16.7 4.3 -0.6 6.3 1.6 10.4 2.7 20.71 3.00 7.50 467.70 3258 23.77 1.2 18.5 6.8 -0.5 12.3 4.8 2.3 1.9 PEL M 10C650C
- 1.0 14.5 7.7
-1. 4 13.4 5.7 ECTIONE I & 2 IK650C
- 2.1 15.2 7.7 0.5 12.4 5.1 SECTIONS 3 & 4
{ IK650C
- 0.5 13.1 4.9
-0.6 11.0 3.7 SECTION 5 10C650C
- 10C6500 9.20 3.00 7.50 207.08 868 14.31
-1.1 7.1 2.2 -2. 3 6.0 1.3 1.1 0.9 17.45 3.00 7.50 392.70 817 7.00 -3. 4 3.4 4.1 -4.5 2.1 -1.7 0.5 0.8 PEL M 10C650E
- 10C650E
-3. 3 3.6 4.7 -5. 4 3.0 -2.0 SEtfl0N5 I & 2 i 10C650E -3.5 0.2 -1.9 -4. 4 0.0 -2.9 ECTIONS 3 10C650E - 3.5 6.4 C.0 -3.6 5.8 -0.2 MC110N 4 1 10C6514 UNIT OPERATORS CONSOLE 14.25 5.08 3.50 253.37 1769 23.83 13.1 21.0 16.0 1.4 16.7 13.8 4.3 4.2 f IK6511
- 2.5 5.08 3.50 44.45 326 25.03 21.6 34.3 27.8 14.2 28.1 21.2 6.2 6.6 POINil NEAR MOT SP015 (CRT n LISHI IULB) 14 5.08 3.50 248.92 3049 41.80
- 7. 4 16.6 12.5 4.3 10.5
- 7. 4 6.1 5.1 10C651C
- 10C6513 2.5 5.08 3.50 44.45 321 24.65 0.5 20.1 15.7 3.0 15.7 11.1 4.4 4.6 10C65tE 14.24 5.08 3.50 253.19 1362 18.36 10.4 19.l 13.2 5.5 17.7 10.0 t.4 3.2 660 CONTROL RM DKP 7.00 3.00 3.50 73.50 517 24.01 NO FIELD TEMPERATURE DATA EOUIP. IS NOT SAFETT RELATED 10C671 FIRE PROTEtitDN STATUS CA8 7.33 2.25 7.50 123.69 2450 67.60 NO FIELD TEMPERATURE DATA TEMP'S EIPECTED SIMILM TO IK604 10C685 ConMoulCATIONS EBUIP CAO 6.00 ' 00 7.50 10.00 600 22.75 NO FIELD TEMPERATURE DATA EIUIP.15 NOT SAFETY RELATED 10C8004 DVEMEAD ANNUNCIATOR PANEL 17.45
2.33 137.45 255 6.33 NO FlELD TEMPERATURE DATA TEMP'S EXPECTE8 TO K Lou (LON HEAT NWSlift 10C8008 9.20 4.38 2.33 72.48 130 6.12 NO FIELD TEMPERATURE DATA TEMP *5 EIPECTED TO K LON tLou HEAT MNSlifi 10C8000 20.79 3.38 2.33 163.70 305 6.36 NO FIELD TEMPERATURE DATA TEW'S EXPECTED TO M LCu (LOW HEAT MNSITV) tot 8000 1.20 3.38 2.33 72.48 130 6.12 NO FIEL8 TEMPENTURE DATA TEW'S EIPECTED TO K Lod (Lou HEAT MNSliVi 10C800E 17.45 3.38 2.33 137.45 255 6.33 NO FIELD TERPERATURE DATA TEr*5 EIPECTE8 TO M Lou (LON HEAT MNS!!TI 101622 IOP CORP LINE PRINTER 3.00 3.00 4.17 37.53 689 62.66 No FIELD TEMPERATURE DATA E00!P. Il NOT SAFETY RELATED IAC633 POST LOCA M2 KCOMI A Cui 2.50 2.50 7.83 48.14 250 17.43 0.1 13.0 6.9 -2.2 6.7 2.3 6.3 4.6 ikM 18C633 POST LOCA M2 RECDPS B CNT 2.50 2.50 7.83 48.14 250 17.43 0.1 13.0 6.9 -2.2 6.7 2.3 6.3 4.6 IATA TAKEN FROM PMEL IAC633 ..m.2mmm.m... .m mmm.m..m..m mmm..mm.mm.m.m m..mm..mmmm m.mm m m. mm m.mm mm m..m m.....m m m.m.m.mm m.mmm mm.m TOTALS 33570 MITS -3.5 34.3 27.8 -5. 4 28.1 21.2 4.4 3.8 THEM VALUES SUMMRiff ALL PMELS 114598 STU/HR MIN MI RAI AV8 MIN MI MI AVS MI RElut AV6 KOUC (AVER 46El (AVERAIE) -3.5 22.5 18 -5. 4 24.1 13.8 4.3 3.6 THESE VALUES SUMARift ALL PMELS EXCEPT PANEL 10C6511 elCH IS NOT CowSIDERED MER41E ffE f piffECEWCC ACTNEEAl '7W[ C&lfAM-AOOM AM&[Al?" 12%*fP 46 '7HE MMC JW77uqt,Agggt 75mpcqyygg
CONTROL ROOM HEAT-UP CURVE e- ~ (ASSUMING NO OPERATOR ACTION TAKEN) CONTROL & ELECTRICAL EQUIPMENT RMS 108 107 -- 106 A 105 I 104 2 103 102 A 101 w 100 L 99 _8 / g 98 - / e" 97 E 4 96 e m 95 7 g 94 2g 93 - < H 92 91 d 90 8 89 88 -.i 87 ' 86-85 -, 84 1 9 83 < l 82 81 80 79 - 78 77 76 0 0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 TIME ELAPSED AFTER LOSS HVAC - MIN A CONTROL RM (5510) O ELEC. EQUIP. ROOM (5302)
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