ML20034B324
| ML20034B324 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 04/19/1990 |
| From: | DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20034B323 | List: |
| References | |
| NUDOCS 9004270011 | |
| Download: ML20034B324 (4) | |
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PLANT SYSTEMS I
3/4.7.6 CONTROL ROOM AREA VENTILATION SYSTEN 1
LIN! TING CON 0! TION FOR OPERATION 3.7.6 Two independent Control Room Area Ventilation Systems shall be OPERABLE.
APPLICA8!LITY:
ALL MODES ACTION:
(Units 1 and 2) l l
MODES 1, 2, 3 and 4:
i With one Control Room Area Ventilation System inoperable. restore the j
inoperable system to OPERA 8LE status within 7 days or be in at least Hot i
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 />.
MODES 5 and 6:
a.
With one Control Room Area Ventilation System inoperable, restore t
i the inoperable system to OPERABLE status within 7 days or initiate and maintain operation of the remaining OPERABLE Control Room Area i
Ventilation System,J ^... f6 ui v vu a G i M ^-. L-d ::" " " : d l
l ee N i
b.
With both Control Room Area Ventilation Systems inoperable, or with 4
the OPERA 8LE Control Room Area Ventilation System, required to be operating by ACTION a,, not capable of, being powered by an OPERA 8LE i
emergency power source, suspend all operations involving CORE
=
ALTERATIONS or positive reactivity changes.
i c.
The provisions of Specification 3.0.4 are not applicable.
i SURVEILLANCE REQUIREMENTS l
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4.7.6 Each control Room Area ventilation System shall be demonstrated f
OPERA 8LE:
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a.
At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the control room l
air temperature is less than or equal to 90*F; J
i b.
At least once per 31 days on a STAGGERED TEST 8 ASIS by initiating, e
from the control room, flow through the HEPA filters and activated l!
1 carbon adsorbers and verifying that the system operates for at least 10 continuous hours with the heaters operating; 9004270011 900419 f
PDR ADOCK 05000413 l
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CATAWBA - UNITS 1 & 2 3/4 7-14 Amendment No. 37 (Unit 1)
Amendment No. 29 (Unit 2) 3 m
_7
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PLANT _$YSTEMS l
j SURVEILlJ.3CE REQUIREMENT 5 (Continued)
.3'j c:t At least once per 18 months or (1) after any structural maintenance
.x on the HEPA filter or activated carbon adsorber housings, or pj M
8 (2) following painting, fire, or chemical release in any ventilation
'1 E 's.2 zone communicating with the system by*
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TctEl$
- s -
1)
Verifying that the cleanup systes satisfias the in-place l
~C 1 C r-penetration and bypass leakage testing acceptance criteria of t
-h t,g d t
l e s s than * '" ' ' ' ' O.055 O.'^ 0; and uses the test pro-(
fb U ' j-y cedure guidance in Regulatory Position C.5.a. C.5.c. and C.5.d*
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c.c of Regulatory Guide 1.52, Revisions 2, March 1978, and the pO IM
% cf $
system flow rate is 6000 cfm 105; b b v>
Verifying, within 31 days after removal, that a laboratory l
2) analysis of a representative activated carbon sample obtained df:
opSq in accordance with Regulatory Position C.6.b of Regulatory O
d Guide 1.52, Revision 2. March 1978, meets the laboratory testing h%oo criteria of t;;hurg N;itier, C.O : ef t;;htrj " ' "
t ; h h.. 2, "; n t 1^'.
'er a methyl iodide penetration of less
$gv0 w."3 od than T P and j
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e, f A-
$ t yt E 3)
Veri"y 60 a system flow rate of 6000 cfm + 105 during systes l
q g +,c o operation when tested in accordance with XNSI N510-1980.
N%Q d.
After every 308 hours0.00356 days <br />0.0856 hours <br />5.092593e-4 weeks <br />1.17194e-4 months <br /> of activde carbon adsorber operation, by f j' :
verifying, within 31 days after removal, that a laboratory analysis "
y of a representative activated carbon sample obtained in accordance iI
-g q.
p, I
with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2.
j 5
g S
March 1978, meets the laboratory testing criteria of t;;.l.ter, N;i-l$ p, j C
4 hr C.S.: Of ^.vvi. 6 7 0.i t 1.52, tvi-i;, 2. " n h iM ", for a methyl iodide penetration of -less than XE;%
-g.-
N.95 j
O M M T' g.-t u/e.
At least once per 18 months by:
I h 3 9.c i
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- p 1)
Verifying that the pressure drop across. the combined HEPA filters, MJ2 activated carbon adsorber banks, and moisture separators is Ji M g -r.s: y less than 8 inches Water Gauge while operating the system at a o
Q.. w q 'J flow rate of 6000 cfm ! 105; 8Y3 Verifying that on a High Radition-Air Intake, or ' Smoke Density-i
\\- $,d ;;\\
2)
Ro High test signal, the system automatically isolates the affected v
W n
% ggCg intake from outside air with recirculating flow through the HEPA j
filters and activated carbon adsorber banks; 1i 3)
Verifying that the system maintains the control room at a posi-tive pressure of greater than or equal to 1/8 inch Water Gauge relative to adjacent areas at less than or equal '~ 3ressuriza-l tion' flow of 4000 cfm to the control room during m use operation:
4)
Verifying that the heaters dissipate 25
- 2.5 kW, and l
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- The requirement for reducing refrigerant concentration to 0.01 ppe may be l
satisfied by operating the system for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> with heaters on and operating.
i
ANei (arbon a&Serber %mples sea + es ted ok 1.0 de y te C.-
l CATAWBA - UNITS 1 & 2 3/4 7-15..-
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PLANT SYSTEMS SURVIILLANCE REQUIRLMENTS (Continued) 5)
Verifying that on a High Chlorine / Toxic Gas test signal
. system automatically isolates the affected intake from o,utside the air with recirculating flow through the HEPA filters and acti-vated carbon adsorbers banks within 10 seconds'(plus air travel E
9 time between the detectors and the isolation dampers),
f.
After each complete or partial replacement of a HEPA filter bank, by verifying that the cleanup systes satisfies the in place-penetration and bypass leakage testing acceptance criteria of less than 5 'C:.'.; "'
0.055 ';..;; G in accordance with AN$1 N510-1980 for a 00P test aero M sol while operating the ristem at a flow rate of 6000 cfm a 105; and After each complete or partial replacement of an activated carbon g.
adsorber bank, by verifying that the cleanup systes satisfies the in place penetration an of less than Z ',,;; ^d bypass leakage testing acceptance criteria i
Q 0.055 '" d 0; in.accordance with ANSI N510-1980 operating the system at a flow rate of G000 cfm t 105.for a halog
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CATAWBA - UNITS 1 & 2 3/4 7-16 AhnMNo. 37 U
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PLANT SYSTEMS BASES 3/4.7.5 STAISBY NUCLEAR SERVICE WATER P0No The limitations on the standby nuclear service water pond (SNSWP) level and temperature ensure that sufficient cooling capacity is available.to either:
(1) provide normal cooldown of the facility, or (2) mitigate the effects of accident conditions within acceptable limits.
The limitations _ on minimum water level and maximum temperature are based on providing a 30-day cooling water supply to safety-related equipment without exceeding its design basis temperature and is consistent with the recommend-ations of Regulatory Guide 1.27, " Ultimate Heat Sink for Nuclear Plants,"
March 1974.
The peak containment pressure analysis assumes that the Nuclear Service Water (RN) flow to the Containment Spray and Component Cooling heat exchangers
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has a temperature of 86.5'F.
This temperature is important in that it, in J
part, determines the capacity for energy removal from containment. The peak containment pressure occurs when energy addition to containment (core decay heat) is balanced by energy removal from these heat exchangers.
This balance is reached far out in time, after the transition from indection to cold leg recirculation and.after ice melt.
Because of the effectiveness of the ice bed in condensing the steam which passes through it, containment pressure is s
insensitive to small variations in containment spray temperature prior to ice moltout.
To ensure that the RN tempbrature assumptions are met. Lake Wylie temperature is monitored.
During periods of time while Lake Wylie temperature f
is greater than 86.5'F, the emergency procedure for transfer of ECCS flow paths to cold leg recirculation directs the operator to align at least one train of containment spray to be cooled by a loop of Nuclear Service Water which is aligned to the SNSWP.
3/4.7.6 CONTROL ROOM AREA VCNTILATION SYSTEM The OPERABILITY of the Control Room Area Ventilation System ensures that:
(1) the ambient air temperature does not exceed the allowable temperature for continuous-duty rating for the equipment and instrumentation cooled by this system, and (2) the control room will remain habitable for operations personnel during and following all credible accident conditions.
Operation of the-l system with the heaters operating to maintain low humidity using automatic control 'for at least'10 continuous hours in a 31-day period is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters.Y Tie OPERABILITY of this system in conjunction with control-room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 r,eas or less whole body, or'its equivalent.
This limitation is con-sistent with the requirements of General Oesign Criterion 19 of Appendix A, 10 CFR Part 50.
ANSI N510-1980 will be used as a procedural guide for surveil-lance testing.
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