ML20203N810
| ML20203N810 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 10/09/1986 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20203N808 | List: |
| References | |
| NUDOCS 8610200041 | |
| Download: ML20203N810 (11) | |
Text
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Armemser I TT/0/A/9100/162 Page 1 of 4 D M POWER CONFANY NcGUIRE NUCLEAR STATION ECCS PUNP ROON PRESSURE VERIFICATION 1.0 Purpose To verify that Unit 1 and 2 ECC8 Pasy Rooms can be maintained at a negative pressure with respect to atmosphere with only the smaller of the two Auxiliary Building filtered exhaust trains operating.
2.0 References 2.1 Auxiliary Building System Description, MCSD-0166-00 2.2 Unit 1 VA Tiow Diagram, NC-1577-1.0 2.3 Unit 1 and 2 VA Flow Diagram, NC-1577-2, -4, -5 3.0 Time Reevired Two hours, using one test coordinator and one technician 4.0 Prereouisite Tests Nose 5.0 TestIsiiment 5.1 010 in. sanometer w/ tubing 5.2 Ss0ka Sticks 6.0 I,teits and Precautions 6.1 During the test, Chemistry sample fume hoods and the Radwaste Air Handling Unit, along with Auz. Bldg. supply units will be tripped when either filtered exhaust train is shutdown.
7.0 Reauired Unit status Nome 8.0 Prereouisite $5 stem conditions None 9.0 Test Method The Unit 1 Auxiliary Building filtered exhaust train will be shutdown, which trips the Auxiliary Building supply air handling units.
i Differential pressure sessurements (with respect to atmosphere) will then be taken at the centrifugal charging pumps for each unit (716'e1.)
and at the east and west ends of the 695' el. These measurements will then be repeateagt.%dfe. exhaust train running, and Unit 2 VA
'U" B610200041 861009 PDR ADOCK 05000369 P
O TT/0/A/9100/162 Page 2 of 4 10.0 Data Requir_ed 10.1 Differential pressure at each ICCS pump room or area.
10.2 Atmospheric conditions (ambient air temperature, wind speed and direction, barometric pressure) during test.
11.0 Accostance Criteria 11.1 Each ECCS pump room is at a negative pressure with respect to atmosphere (optimal, but not required range: vacuus of 1 25" w.g.)
TT/0/A/9100/162 Page 3 of 4
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1 12.0 Procedure IOitial/Date g:
IV seans that Independent Verification is required.
NOTE:
If fewer than 3 attempts at establishing ECCS pump room vacuum is required, the remaining sections may be marked N/A.
If 4 or more attempts are required, sections may be resigned and a new 3.1 completed.
Section 12.1
$44/g)g 12.1.1 List corrective actions taken to increase auxiliary building vacuur. on Enclosure 13.1.
Idd kV2/f &
12.1.2 Ensure Unit i VA Filtered Exhaust Yans are 0FF, and
/
Unit I and Unit 2 VA Supply Fans are OFF.
/g/$
12.1.3 Ensure Unit 2 VA Filtered Exhaust Fans A and B are ON.
/gG/F6 12 1.4 Complete Enclosure 13.1, Steps 1 through 3.
(g/1//6 12 1.5 Ensure that Unit i VA Filtered Exhaust Fans A and 3 arerestoredtoservice(0N),andthatUnit2VA Filtered Exhaust Fans A and B are OFF.
fdd //g/4 12.1.6 Complete Enclosure 13.1, Step 4.
/4[.
12.1.7 If pressure testing la complete or suspended, return E
/o IV VA system control to Operations. Apprise Operations N
that all VA supply fans are off and only Unit i VA Filtered Exhaust Train is operating, so that system tagging for continued VA day maintenance, or systen restoration may proceed, as required.
IV blank should I'
be signed by OPS representative.
Section 12.2
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12.2.1 I.ist corrective actions taken to increase auxiliary building vacuus on Enclosure 13.1.
/
12.2.2 Ensure Unit 1 VA Filtered Exhaust Fans are OFF, and Unit 1 and Unit 2 VA Supply Fans are OFF.
/
12.2.3 Ensure Unit 2 VA Filtered Enhaust Fans A and B are ON.
/
12.2.4 Complete Enclosure 13.1, Steps 1 through 3.
/
12.2.5 Ensure that Unit i VA Filtered Exhaust Fans A and B are restored to service (ON), and that Unit 2 VA Filtered Euhaust Fans A and B are OFF.
TT/0/A/9100/162 Page 4 of 4
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12.2.6 Complete Enclosure 13.1. Step 4.
_,,_/
12.2.7 If pressure testing is complete or suspended, return
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IV VA system control to Operations. Apprise Operations that all VA supply fans are off and only Unit 1 VA Filtered Exhaust Train is operating, so that system tagging for continued VA day maintenance, or system restoration may proceed, as required.
IV blank should be signed by OPS representative.
Section 12.3
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12.3.1 List corrective actions taken to increase muniliary building vacuus on Enclosure 13.1.
/
12.3.2 Ensure Unit 1 VA Filtered Enhaust Fana are OFT, and Unit I and Unit 2 VA Supply Fans are OFF.
____/
12.3.3 Ensure Unit 2 VA Filtered Enhaust Fans A asd B are ON.
/
12.3.4 Complete Enclosure 13.1, Steps 1 through 3.
/
12.3.5 Ensure that Unit i VA Filtered Exhaust Fans A and B are restored to service (ON), and that Unit 2 VA Filtered Exhaust Fans A and B are OFF.
_/
12.3.6 Complets Inclosure 13.1, Step 4.
/
12.3.7 If pressure testing is complete or suspended, return
_ / _ IV VA system control to Operations. Apprise Operations that all VA supply fans are off and only Unit 1 VA Filtered Ishaust Train is operating, so that system tagging for continued VA day maintenance, or system restoration may proceed, as required.
IV blank should be signed by OPS representative.
13.0 Enclosures 13.1 ECCS Pump Roos Pressure Data
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TT/0/A/9100/162 Pag? I of 2 1 3.1 ECC8 Pasp Room Pressure Data Listcorrectiveactionstakentoincreaseauxiliary[buildingvaguus:dl4 CfC5c.) s 1.
(t h le_ E s',a a krsA rol)-M danr
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2.
Record atmospheric conditions:
Wed Wind Speed Imrh Ambient Temperature 1Y.f C hl.f C.-
Direction
< m. H - v a.s t-Barometric Pressure 'lt't /,,#g 3.
Ra' cord pressure with respect to atmosphere at the following locations (2VA Exhaust Fans A and 3 running):
695' el., tant Ead:
.'2.6 in, w. g.
695' el., West End:
. l [s in, w.s.
NV Pump 1A Room, 716' el.
. 'l d in, w.g.
NV Pump 18 Roca, 716' el.
,1 [o in. v.g.
NI Pump 1A Roos, 716' el.
. 'l 1 in,v.s.
NI Pump 15 Room, 716' el.
,l7 in v.g.
NV Pump 2A Room, 716' el.
. ~1 de in, w.g.
NV Pump 28 Room, 716' el. -
.1S in w.g.
NI Pump 2A Room, 716' el.
. 1 ~7 in. v.g.
NI Pump 25 Roos, 716' el.
. 3-7 in. w.g.
1
TT/0/A/9100/162 Page 2 of 2 gaclosure 13.1 ECCS Pump Room Pressure Data 4.
Record pressure with respect to atmosphere at the following locations (17A Rabaust Fans A and 3 ruantag):
695' el., East Ends
. 3 2.
in. v.5 695' e1., West End:
.31 in, w.g.
NV Pump 1A Room, 716' el.
.31 in. w.g.
NV Puay 15 Room, 716' el.
.3C in v.g.
NI Pump 1A Room, 716' el. *
. M.3l in. v.s.
NI Pump 1R Room, 716' el.
.3l in. v.g.
MV Pump 2A Roos, 716' el.
.31 in, w.g.
NV Pump 23 Room, 716' el.
.31 in, w.g.
NI Pug 2A Room, 716' el.
. 2.3 in v.g.
NI Pump 25 Room, 716' el.
,33 in. v.s.
Data Recorded By:
MN buco u Date:
/0 /o 1/# f I
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3 L
ATTACHMENT 2 McGUIRE NUCLEAR STATION AUXILIARY BUILDING FILTERED VENTILATION EXHAUST SYSTEM POST-ACCIDENT HEAT REMOVAL AND HUMIDITY CONCERNS i
A design basis of the Auxiliary Building Filtered Ventilation Exhaust (VA) System l
1s to provide a suitable environment for the operation of vital equipment during i
an accident. This function is basically a heat removal requirement, and is accomplished by several essential cooling units which serve mechanical safeguards equipment (reference FSAR Figure 9.4.2-2).
This system of cooling units is in addition to the Control Area Ventilation (VC) System, which provides cooling for j
essential electrical equipment.
Primary cooling of essential mechanical equipment is provided by one of three j
methods:
- 1) essential VA' system cooling units mentioned above, 2) cooling water, either from component cooling (KC) or nuclear service water (RN), or 3) direct i
cooling from the process fluid. Cooling methods for various pieces of equipment are' delineated in Table I.
Operation of the VA System provides a supplemental cooling effect, but from a heat removal standpoint, is not considered necessary for mitigating an accident.
Calculations have been performed to predict post-accident temperatures in the auxiliary building based on heat loads measured during normal plant operation.
With both exhaust trains operating, the maximum estimated building temperature is b
100 degrees-F. With only the smaller of two exhaust trains operating, the maximum estimated building temperature is 135 degrees-F. While the latter_value exceeds j
the temperature established for continuous operation of some essential equipment.
j.
a temporary excursion to this level is considered acceptable. Also, these con-servative temperature estimates are based on extended operation at high ambient outdoor temperatures, and with no credit taken for reduced heat loads concurrent with unit shutdown.
I An additional design basis of the VA System is to filter potentially contaminated exhaust air prior to atmospheric release through the unit vent. The air cleaning i
industry recognizes the effect of humidity on the performance of activated carbon i
used in filter systems, and therefore has adopted the practice of limiting relative humidity of the influent airstream to 70 percent. The McGuire VA System
]
contains inherent features which will limit the influent relative humidity to approximately 70 percent under all postulated conditions. The system exhausts air from all levels of the building, such that potentially high humidity in che ECCS pump area will be diluted by relatively dry air from other areas prior to entering the filter unit.
Internal heat gains within the auxiliary building also serve to reduce the influent relative humidity by heating the air as it passes through the 2
building. The use of preheaters to reduce influent humidity is therefore un-1 necessary.
l Two outdoor conditions have been analyzed which will produce high influent humid-1 ity for the carbon filter units. These conditions will envelope all postulated weather conditions at the plant site with respect to producing high building humidity. The analysis procedure assumes that exhaust makeup air enters the 1
~ building at outside air conditions through cracks, doors, supply duct leakage, etc., and undergoes sensible and latent heat additions within the building.
Conditions are predicted using accepted psychrometric methodologies and equations.
All analyses are based on ECCS pump room conditiogs of 145 degrees-F, 100% RH, and j
a minimum internal building heat gain of 1.2 x 10 Btu /hr, which is approximately j
50 percent of the normal heat gain. All cases result in relative humidity less than 75 percent. Results are tabulated in Table II.
4
S 9
TABLE I COOLING METHODS FOR ESSENTIAL MECHANICAL COMPONENTS SYSTEM COMPONENT COOLING SOURCE ND RHR PUMP VA COOLING UNIT 4
NS CONTAINMENT SPRAY PUMP VA COOLING UNIT KF FUEL POOL COOLING PUMP VA COOLING UNIT CA AUXILIARY FEEDWATER PUMP SERVICE WATER
- KC COMPONENT COOLING PUMP SERVICE WATER NI SAFETY INJECTION PUMP SERVICE WATER NV CENTRIFUGAL CHARGING PUMP SERVICE WATER NV BORIC ACID TRANSFER PUMP PROCESS LIQUID RN NUCLEAR SERVICE WATER PUMP SERVICE WATER VC/YC CONTROL AREA VENTILATION SERVICE WATER VE ANNULUS VENTILATION PROCESS AIR d
s 1
v
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--gwp,w-. ry g-,
my+
y-rw pw e
a-
--9-w-------+w,-,,w-g-aw---
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TABLE II
SUMMARY
OF AUXILIARY BUILDING HUMIDITY ANALYSIS CONDITION NUMBER OUTSIDE TEMPERATURE FILTER TRAINS OPERATING INFLUENT RH 1
95db, 80wb (52% RH)
BOTH 49%
2 95db, 80wb (52% RH)
SMALLER OF WO 37%
3 80db, 78wb (90% RH)
BOTH 73%
4 80db, 78wb (90% RH)
SMALLER OF WO 50%
t 9
1 l
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...., _., _.. _ _ _.. _ _ _. _ _ _ _ _ _ _.. ~.
O 9
ATTACHMENT 3 PROPOSED McGUIRE UNITS 1 AND 2 TECHNICAL SPECIFICATION CHANGES REVISION
-PLANT SYSTEMS AUXILIARY SUILDING FILTERED VENTILATION EXHAUST SYSTEM 3/4.7.7 LIMITING CONDITION F0P OPERATION 4tWAuxiliary Building Filtered Ventilation Exhaust Systemsshall be l
7wo 3.7.7 QPERIALE.
APPLICA81LITY:
MODES 1, 2, 3, and 4.
4 l
ACTION: (wir) i 4~e 1) 7 PAv3 WiththMAuxiliaryBuildingFilteredVentilationExhaus System inoperable, l'
restore the inoperable system to OPERA 8LE status withi Zs meurt or be in at least H0T STAN08Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the
{
following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> F SURVEILLANCE REQUIREMENTS 4.7.7 -Eld kuxiliary Building Filtered Ventilation Exhaust System shall be y
demonstrated OPERA 8LE:
initiating, from the control room, flow At least once per 31 days, b) through the HEPA filters and charcoal adsorbers and verif.ying that a.
the system operates for at least 15 minutes; At least once per 18 months, or (1) after any structural maintenance b.
on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire, or chemical release in any ventilation zone communicating with the system, by:
Verifying that the cleanup system satisfies the in-place pene-1) tration and bypass leakage testing acceptance criteria of less than 1% and uses the test procedure guidance of Regulatory Positions C.5.a. C.5.c and C.S.d of Regulatory Guide 1.52, Revision 2, March 1978, and the system flow rate is 54,000 cfm i 105 (both fans operating - Unit 1) or 43,000 cfm + 10% (both fans operating - Unit 2);'
- Un i 11:
p.
Sep emb 7,
83, OT AND co i on may e ai a ne n
Uni 1 witho proces to CO HUTDOWN.
If the ystem not r core to OP st by th me, b COLD WH it in e
llo i 3 h es.
Amendment No. \\ (Unit 1)
McGUIRE - UNITS 1 and 2 3/4 7-16 Amendment No.
(Unit 2)
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