ML20073B925

Proposed Tech Specs Re Operability Requirements for Radiation Monitoring Instrumentation Channels

ML20073B925
Person / Time
Site:	Byron, Braidwood
Issue date:	04/19/1991
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20073B922	List: ML20073B919 ML20073B925
References
NUDOCS 9104250008
Download: ML20073B925 (2)

Text

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INSTRUMENTATION

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3/4.3.3 MONITORING INSTRUMENTATION RADIATION MONITORING FOR PLANT OPERATIONS LIMITING CONDITION FOR OPERATION 3.3.3.1 The radiation monitoring instrumentation channels for plant operations

. shown in Table 3.3-6 shall be OPERABLE with their Alarm / Trip Setpoints within the specified limits.

APPLICABILITY: As shown in Table 3.3-6.

, ACTION: -

a. With a radiation monitoring char.nel Alarm / Trip Setpoint for plant operations exceeding t'he value shown in Table 3.3-6, adjust the Setpoint to within the limit within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or declare the channel inoperable,

b. With one or more radiation monitoring channels for plant operations inoperable, take the ACTION shown in Table 3.3-6.

c. TheprovisionsofSpecification/3.0.3end2.0."arenotapplicable, l

. SURVEILLANCE REQUIREMENTS 4.3.3.1 Each radiation monitoring instrumentation channel for plant operations shall be demonstrated OPERABLE by the performance of the CHANNEL CHECK, CHANNEL CALIBRATION and DIGITAL CHANNEL OPERATIONAL TEST for the MODES and at the frequencies shown in Table 4.3-3. -

BYRON - UNITS 1 & 2 3/4 3-39 9104250008 910419 PDR ADOCK 05000454 p PDR

g J A/6 /'

3/4.0 AP CABldTY BASES' [

The' specifications of this section provide the general requirements ,

h liedble to each of the Limiting Conditions for an Operation and Surve,il-la e Re'quirements within Section 3/4. In the event of a disagreement between /

the equirements stated in these Technical Specifications and those ptated in en ap licable Federal Regulation or Act, the requirements stated ir/the applic . le Federal Regulation or Act shall take precedence and shp11 be met.

3.0. This specification defines the applicability of eac[ specification in terms o defined OPERATIONAL MODES or other specified condjtions and is provided to elineate specifically when each specification applicable.

3.0.2 Th- specification defines those conditions nec'essary to constitute compliance with e terms of an individual Limiting Condi' tion for Operation and associated AC ON requirement.

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3.0.3 The spec ication delineates the measurd to be taken for those circumstances not dir{e(tly provided for in the ACp0N statements and whose occurrence would violath the intent of a specification. For example, Specifi-cation 3.5.2 requires two ndependent ECCS subsystems to be OPERABLE and provides explicit ACTION re uirements if one JCCS subsystem is inoperable.

Under the requirements of Spetification 3.0 4 , if both the required ECCS subsystems are inoperable, with n 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> tpdasures must be initiated to place the unit in at least HOT STANDBY ithin the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in et least HOT SHUTDOWN within the following 6 ho (s. As a further example, Specification 3.6.2.1 requires two Containment Spr4 Systems to be OPERABLE and provides explicit ACTION requirements if onej$p y System is inoperable. Under the requirements of Specification 3.0 B if b f Systems are inoperable, within 3/ hour me\th a res must the required to be initiated Containment place the Spray unit in at least' HOT STANDBY w thin the nex 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in at least HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> nd in COLD SH OWN within the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. It is acceptablej o initiate and co lete a reduction in OPERATIONAL terval than required i the ACTION statement and to MODESinashortertimeipthisallowableout-of-servicetimetothatprovided add the unused portion of for operation in subsecplent lower OPERATIONAL MODE ( , Stated allowable out-of-service times pre applicable regardless of the PERATIONAL MODE (S) in which the inoperabil. tty is discovered but the times pro ided for achieving a mode reduction areMot applicable if the inoperability is discovered in a mode lower than the a p'licable mode. For example, if the Conta ment Spray System was discovered be inoperable while in STARTUP, the ACTION tatement would allow up to 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> to achieve COLD SHUTDOWN. If HOT STAND lis attained in 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> rathfr than the allowed 78 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br />, 140 hours0.00162 days <br />0.0389 hours <br />2.314815e-4 weeks <br />5.327e-5 months <br /> would sti1Txbe available beforethe/lantwouldberequiredtobeinCOLDSHUTDOWN. Howevb t , if this system waydiscovered to be inoperable while in HOT STANDBY, the 6 ' hours provided/toachieveHOTSTANDBYwouldnotbeadditivetothetimeava\lable to ach)fve COLD SHUTDOWN so that the total allowable time is reduced ff m 156 h6urs to 150 hours0.00174 days <br />0.0417 hours <br />2.480159e-4 weeks <br />5.7075e-5 months <br />.

[3.0.4 This specification provides that entry into an OPERATIONAL MOD or o,ther specified applicability condition must be made with: (1) the full comp gment 6f required systems, equipments or components OPERABLE, and (2) all other \

/ parameters as specified in the Limiting Conditions for Operation being met \

without regard for allowable deviations and out-of-service provisions contained in the AC1 ION statements.

BYRON - UNITS 1 & 2 B 3/4 0-1