ML20111C580
| ML20111C580 | |
| Person / Time | |
|---|---|
| Site: | Dresden  (DPR-19-A-083, DPR-19-A-83, DPR-25-A-077, DPR-25-A-77) |
| Issue date: | 03/14/1985 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20111C583 | List: |
| References | |
| NUDOCS 8503150466 | |
| Download: ML20111C580 (4) | |
Text
Amindmsnt No. p6~ 83 Corrected !MR 141985 3.2 LIFITING CONDITION FOR OPhRATION 4.2 SURVEILLANCE REOUIREMENTS (CONT'D)
(CONT'D) in the fuel storage' pool treatment system initiation and during refueling or shall be performed at least fuel movement operations.
each operating cycle.
2.
One of the two re-,'
fuelins ficor. radiation
- .::.it:rs may be in per-I thic fer 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
If the inoperable monitor is not restored to service in this time, the reactor building
, ventilation system shall be isolated and the standby gas treat-ment operated until repairs are complete.
'3.
The trip setting for the refueling floor radiation monitors shall be set at a less than or equal to 100mr/hr.
4.
Upon loss of both re-fueling floor radiation' monitors while in use, the reactor building ventilation system shall be isolated and the standby gas treat-ment operated.
E.
Intentionally left blank 8503150466 850314
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3/4.2-3 PDR ADOCK 05000237 P
PDR 3960a 3843A
Amendment No, pt, 83 4
Corrected gr 14 tge; 3.2 LIMITING CONDITION FOR ' OPERATION EM ES (Cont'd.)
For effective emergency core coolin HPCI system must function since reactog for small pipe breaks, the rapidl time. y enough to allow either c, ore spray or LPCI to oper The aut~omatic pressure relief functi backup to the HPCI in the event the EpCI d on is provided as a fun:tien cher ne:creary c.nd minimi:sarrangement of th The c
cs to provide this above criteria are metsettings given in the specification are ad cpuri::: O p e rr.t i on.
7tc trip specification preserves (the effectivenessEsf. SAR Section 6.2.6 The the risk of inadvertent operation; iperiods of mainten on and also minimizes channel out of service.
.e., only one instrument Two radiation monitors are provided on th initiate isolation of the reactor buildi e refueling floor which standby gas treatment systems.
ng and operation of the Trip settings of less than or equal tThe trip logic is one out of two ventilation isolation and standby gas tron the refuelin
- c. ting normal so that none of the activity released durieatment system operation accident leaves the reactor building via thng the refueling stack but that all the activity is procese normal ventilation
- treatment system.
sed by the standby gas
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l The radioactive liquid and gaseous and gaseous effluents during releasesprovided to monit 1
active materials in liquid the instruments are provided to ensu The alarm setpoints for prier to exceeding the limits of 10 CFR 20re that the alarms will occur B 3/4.2-29 3960a
- I 3843A 1
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DRESDEN III
'DPR-25 Amendment No. 76 7
CorrectedEAR 14 NbD 3.2 LIF.ITING CONDITION FOR OPERATION
! CONT'D)
~
4.2
~ SURVEILLANCE oro?IErvrr* "-
-~
! CONT'D) in the fuel storage pool and during refueling or treatment system initiation fuel movement operations.
shall be performed at least each operating cycle.
2.
One of the tvo re-i fueling f.'ccr radiation m:nitors mty be inoper-able for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
If the inoperable monitor is not restored to service in this time, the reactor building ventilation system shall be isolated and the standby gas treet-ment operated until repcirs are complete.
3.
The trip setting for the refueling floor radiation monitors shall be set at a less than or equal to 100me/hr.
4.
Upon loss of both re-fueling floor radiation monitors while in use, the reactor building ventilation system shall be isolated and the standby gas treat-ment operated.
E.
Intentionally left blank l
l 3E40a 3/4.2-3 3845A
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'DRESD'EN III DPR-25
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Amandmsnt No. )$, 77 Corrected ggg 14 jggg 3.2 LIMITING CONDITION FOR OPERATION BASES (Cont'd.)
For effective emergency core cooling for small pipe breaks, the HPCI system must function since reactor pressure does not decrease rapidly enough.to allow either core spray or LPCI to operate in time.
The automatic pressure relief function is.provided as a backup to the HPCI in the event the HPCI does not operate.
The errcngement of the tripping contacts is such as to. provide this function rhen necessary and cinimize spuricus cpertticn.
The trip settin5s given in the specification are adequate to assure the above criteria are met (Ref. SAR Section 6.2.6.3).
The specification preserves the effectiveness of the system during periods of maintenance, testing or calibration and also minimizes the risk of inadvertent operation; i.e., only one instrument channel out of service.
Two radiation monitors are provided on the refueling floor which initiate isolation of the reactor building and operation of the standby gas treatment systems.
The trip logic is one out of two.
Trip settings of less than.or equal to 100 mR/hr for the monitors on the refueling floor are based upon initiating normal ventilation isolation and standby gas treatment system operation so that none of the activity released during the refueling accident leaves the reactor building via the normal ventilation stack but that all the activity is processed by the standby gas treatment system.
4 1
i i.-
The radioactive liquid and gaseous effluent instrumentation is provided to monitor the release of radicactive =aterials in liquid and gaseous effluents during releases.
The alarm setpoints for j
the instruments are provided to ensure that the alarms will occur prior'to exceeding the limits of 10 CFR 20.
B 3/4.2-29 3S4Ca 3845A
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