ML20151B589
| ML20151B589 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 07/12/1988 |
| From: | CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | |
| Shared Package | |
| ML20151B586 | List: |
| References | |
| NUDOCS 8807210030 | |
| Download: ML20151B589 (3) | |
Text
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Athc. W t 2.
n-cs.t/ne-Oss5L l o f 2-pcp CONTAINMENT SYSTEMS 3
ORYWELL AVERAGE AIR, TEMPERATURE 4.-
LIMITING CONDITION FOR OPERATION 3.6.2.6 Drywell average air temperature shall not exceed 145'F.
APPLICABILITY:
OPERATONAL CONDITIONS 1, 2 and 3.
ACTION:
With the drywell average air temperature greater than 145*F, reduce the average air temperature to within the limit within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in at least HOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTOOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.6.2.6 The drywell average air temperature shall be the a.aithmetical average
- of the temperatures at the following elevations # and shall be determined to be within the limit at least once per 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s:
Elevation Azimuth a.
653'-8" 315*, 220*, 135, 34*
b.
634'-0" - 640'-0" 340*, 308, 215*, 145*,
30*, 20*
c.
604 ' -6 - 609 ' -8" 310*, 308*, 253, 212*,
150*, 140*, 80*
- At least one reading from each elevation for an arithmetical average.
- The temperature at each elevation shall be the arithmetical average of the temperatures obtained from all available instruments at that elevation.
FERRY - UNIT 1 3/'. 6-21 Amendment No. 6 8907210030 880712 PDR ADOCK 05000440 P
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j CONTAINMENT SYSTEMS 8ASES 3/4.6.2.4 ORWELL STRUCTURAL INTEGRITY This limitation ensures. that the structural integrity-of the drywell will be maintained comparable to the original design specification for the life of the unit.
A visual inspection in conjunction with Type A leakage tests is sufficient to demonstrate this capability.
3/4.6.2.5 ORWELL INTERNAL PRESSURE The limitations on drywell-to-containment differential pressure ensure that the drywell peak calculated pressure of 21.8 psig does not exceed the design pressure of 30.0 psig and that the containment > peak pressure of 11.31 psig does not exceed the design pressure of 15.0 psig during LOCA conditions.
The maxi-mum external drywell pressure differential is limited to +0.5 psid, well below the 2.4 psid at wnich suporession pool water will be -forced over. the wier wall and into the crywell.
The limit of 2.0 psid for initial positive drywell to containment pressure will limit the drywell pressure to 21.8 psig which is less than the design pressure and is consistent with the safety analysis.
3/4.6.2.5 ORWELL AVERAGE AIR TEMPERATURE The dryvell average temperature is an input parameter to the' containment /dryvell response analyses as the result of a DSA-LOCA.
Furthermore, the dryvell average temperature 1.5 important in dryvell equipment qualification considerations.
i 3/4.6.3 DEP9ES$URIZAT'ON SYSTEMS The succifications of this section ensure that the drywell and containment pressure will not exceed the design pressure of 30 psig and 15 psig, respec-tively, during primary system blowdown from full operating pressure.
The suppression pool water volume must absorb she associated decay and structural sensible heat released during a reactor blowdown from 1045 psig.
Using conservative parameter inputs, the maximum calculated containment pressure during and following a design basis accident is below the containment design prqssure of 15 psig.
Similarly the drywell pressure remains below the desirn pressure of 30 psig.
Tha maximum and minimum water volumes for the suppression pool are 118,548 cubic feet and 115,612 cuofc feet, respectively.
These values include the water volume of the a.nntainment pool, horizontal vents, and weir annulus. Testing in the Mark III Pressure Suppression Test Facility and analysis have assured that the suppression pool temperature will not rise above 185'F for the full range of break sizes.
Should it he necessary to make the suppression pool inoperable, this shall only be done as specified in Specification 3.5.3.
Experimental data indicates that effective steam condensation without excessive load on the containment pool walls will occur with a quencher device i
and pool temperature below 200*F during relief valve operation.
Specifications have been placed on the envelope of reactor operating conditions to assure the bulk pool temperature does not rise above 185*F in compliance with the containment structural design criteria.
J PERRY - UNIT 1 B 3/4 6-4 2
Attachnsnt 3
-PY-CEI/NRR-0855 L 1
I Date Intake Temp.
Dryvell Avg. Temp.
7/1/88 68 F 128.9 7/2/88 67 F 129.8 7/3/88 67 F
.130.1 U
7/4/88 66 F 130.9
)
7/5/88
-66 F.
131.05' 0
7/6/88 67 F 131.4 7/7/88
-67 F 129.26 7/8/88 69 F 129.3 7/9/88 70 F 129.9 7/10/88 76 F 132.6 7/11/88 76 F 133.8 7/12/88 76 F 133.9 2
7/12/88 135.9 1
Reading taken on mid shift rounds 2
Reading taken on 7/12/88 at 1652 hours0.0191 days <br />0.459 hours <br />0.00273 weeks <br />6.28586e-4 months <br /> i
1 1
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