ML20116M886
| ML20116M886 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 11/16/1992 |
| From: | CENTERIOR ENERGY |
| To: | |
| Shared Package | |
| ML20116M857 | List: |
| References | |
| NUDOCS 9211230105 | |
| Download: ML20116M886 (5) | |
Text
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P 7-C E T/NR R - lg 37 L C_0N1A!NMENT SYSTEMS g
,j g7 SRPRESSION_POOLMAKEUPSYSTEM
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3 r cc;NDITION FOR OPERATION ____--
y The suppression pwl maketp system sh611 be OPERABLE.
3.
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OPERATIONAL CONDITIONS 1, 2 and 3.
ix..
A.
Wi. i or,a suppression pool makeup line inoperable, restore the inoperable makeup line to OPERABLE statu; within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT SHUTDOWN 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 />.
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unaa the limit, c.
With upper containment pool water ten,,.ature g,wi restore t' ontainment pool water tempera are to within the limit or be in at icist HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> W '.hin 24 x J in COLD.mviDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
SURVEI'_ LANCE REUIREMENTS
.o.3.4 The suppression pool rcakeup system @all be demonstrated OPERABLE:
a.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by verifying the upper containment pool water:
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2.
Temperature to be less than or equal to 100 F.
b.
At least once per 31 days by verifying that:
4& vara:; /rnctor 11-pool gate 54 eemoved a*+ rt sat s cut are Gue Mi ap:r 1
% ac the fuel transfee pool gate 4o " ;'leee may be iut.lleA),
j 2.
Each valve, manual, power operated or automatic, in the flow path that is not-locked, sealed, or otherwisc secure in psition, is in its correct pt.sition.
c.
At least once per 18 tonths by performing a system functional test which includes simulated automatic actuatien of the system throughout its emergency operat;ng sequence and verifying that each automatic valve in the flow pati actuates to its correct position. Actual makeup of water to the suppression pool may be exct.:,cd from this test.
41 PERRY - UNIT 1 3/4 6-27
- 211230105 921116 J
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PY-CEI/NRR-1537 L Page 2 of 5 Insert A b.
Vitt the upper containment pool vater level less than the limit specified in ' tveillance Requirement 4 6.3.4.a.l.a, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> eithat:
1.
Restore the vater level to within the limit, or 2.
Maintain the upper containment pool vater level greater than the limit specified in Surveillance Requirement 4.6.3.4.a.1.b, e.ud raise the supptession pool vater level in accordance with Survellivnce p
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Requirement 4.6.3.4.a.l.b.
R 4
Otherwise, be in at least fl0T SIIUTDOWN 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 SilVTDOVN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Insert B 1.
Level to be greater than or equal to:
a) 22'-10" above the reactor pressure vessel flange, or b) 22'-5" above the reactor pressure vessel flange, and a mini am suppression pool vater level greater than or equal to the minimur val-fe specified in LCO 3.6.3.1.a plus 2.75 inches, and Note:
If this Technical Specification amendment request is processed aft-r the changes proposed in letter PY-CEI/NP.R-1510L are approved and losued, the value for the UCP vater level vill have o en changed from 22'-10" to 22'-9".
Surveillance Requirement 4.6.3.4.a.1.a should then be revised to read 22'-9", and Surve'llance Requirement 4.6.3.4.a.1.b should specify a suppression pool comper..'atory value of 2.20 inches.
l'7-c EI/N AK ~ / S37 L CONTA% MENT SYSTEMS l% c. 1 ef f 3
BASES
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DEPidSSURIZATION SYSTEMS (Continued)
In addition to the limits on temperrture of the supnression pool water, operating procedures define the action to be taken in th
'ent a safety-relief valve inadvertently opens or sticks open. As a minimum tu action shall include:
(1) use of all available means tc close the valve, (2) initiate-suppression pool water cooling, and (3) if other safety-relief valves are used to depresarize the reactor, their discharge shall be separated from that of the stuck-open safety relief valve, where possible, to asrure mixing and uniformity of energy insertior, to the pool.
The containment spray system concists of two 100% capacity loops, each with three spray rings located at different elevations about the ir. side circum-ference of the containment.
RHR pump A supplies one loop and RHR pump B sep-
', the other.
RHR pump C cannot supply the spray system.
Dispersion of the i
of water is effected by 345 nozzles in each loop, enhancing the condensa-t )n Sf water vapor in the containment volume and preventing overpressurization.
Heat rejection is through the RHR heat exchangers. The turbulence caused by the spray system aicts in mixing the containment air volume to maintain a homogenecos mixture for H2 control.
The suppression pool cooling function is a mode of Oe RHR system and functions as part of the containment heat removal system.
Tt.e purpc u,,f the system is to ensure cocinemt integricy following a LOCA by prevr.nting exces-sive containment pressures and i.9mperatures. The suppression pool cooling mode is designed to limit the long tern, bulk temperature of the pool to 185*F con-sidering all of the posi.-LOCA eneryy additions. The suppression pool cooling trains, being an integral part of 'ie RHR system, are redundant, safety-related component systems that are initiatrd following the recovery of the reactor vessel water level by ECCS floss from the RHR system.
Heat rejection to the emergency service water is accomplishod in the RHR heat exchangers.
The suppression pool make-up system provides water from the upper centainment pool to the suppression pool by gravity flow through two 100%
capacity dump lines following a LGCA. Ths quantity of water providtd is sufficient to account for all conceivable post-accident entrapment volumes, "nsuring the long term energy sir' capabilities of the suppression pool and maintaining the water coverage ove the uppermost drywell vents.
During refueling, there will ba administrative control to ensure the make-up oump valves will not be opened.
h9 lInse.rt C]
3/4.6.4 CONTAINMENT ISOLATION VALVES The OPERABILITY of the containment inhtion valves ensures that the.
containment atmosphere will be isolated from the outside environment in the event of a release of radioactive material to the containment atmosphere or pressurization of the containment and is consistt' with the requirements c' GDC 54 through 57 of Appendix A to 10 CFR 50. tontainment isolation within the time limits specified for those _ isolation valves designed to close auto-matically ensures that the release of radioactivt material to the environment will be consistent with the assumptions used in che analyses'for a LOCA.
PERRY - UNIT 1 B 3/4 6-5 a <
PY-CEI/NRR-1537:L
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Attachment:
2-Page 4 of-5 Insert C The upper containment pool vater level may be reduced.(for example, for
- maintenance of the inclined fuel transfer systeni),. provided the minimum required suppression pool level (volume) is raised to compensate. Rad i..tng the -
minimum required suppression pool water level provides the same effective-volume of water (by transferring a portion of the upper pool dump _ volume to the suppression pool) and ensures that after a suppression-poel make-up system dump, adequate water coverage over the uppermo't dryvell liorizontal vents and-the long-term energy sink capability of the suppression' pool-is maintained.
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A #ad muf A CONTAINMENT SYSTEMS p
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3/4.6.3 DEPRESSURIZATION SYSTEMS SUPPRESSION POOL LIMITING CONDITION FOR OPERATION 3.6.3.1 The suppression pool shall be OPERABLE with the pool water:
Ltc Ader ta a.
Volume between 115,612 ft3 and 118,648 ft3 equivalent to a levtl t' I" between 18'0" and 18'6", and a L***N
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b.
Maximum average temperature of 90 F except that the maximum average temperature may be permitted to increase to:
1.
10SF during testing which adds heat to the suppression pot 1.
2.
110 F with THERMAL POWER less then or equal to 1% of RATED THERMAL POWER.
3.
120 F with the maia steam line isolation valves closed following a scram.
APPLICABILITY:
OPERATIONAL CONDITIONS 1, 2 and 3.
ACTION:
With the suppression pool water level outside the above limits,
(
a.
restore the water level to within the limits within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in at least HOT SHUTOOWN within the next 12 hc'rs and in COLO SHU100VN withir the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
b.
With the suppression pool averaga wata" temperature greater than 90*f, restore the average temperature to lese than or equal to 90 F within 24 Murs be in at least HOT SHUT 0Ct.a within the next
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12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and i.
OLD SHUTOGWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, except, as permitied above:
i.
With the suppress %n pool average water temperature greater than 105 F during testing which adds heat to tne suppression pool, stop all testing which adds heat to the suppression pool and restore the average temperature to less than 90 F withir.
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or te in at least HOT SHUT 00WN withis 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 h >urs.
2.
With the suppression pool average water temperature greater than:
a) 90 F for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and THERMAL POWER greater than 1% of RATED THERMTL POWER, be in at least HOT SHUT 00WN within 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 next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
I, b) 110 F, place the reactor mode switch in the Shutdown position had operate at least one residual heat removal loop in the suppression pool cooliag mode.
PERRY - UNIT 1 3/4 6-22
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