ML20100H841
| ML20100H841 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 02/22/1996 |
| From: | ILLINOIS POWER CO. |
| To: | |
| Shared Package | |
| ML20100H836 | List: |
| References | |
| NUDOCS 9602280083 | |
| Download: ML20100H841 (5) | |
Text
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. Attschmnt 3 to U-602522 LS-94-004
' Pege 2 of 2 EOC-RPT Instrumentation 3.3.4.1 SURVEILLANCE REQUIREMENTS (continued)
SURVEILLANCE FREQUENCY SR 3.3.4.1.2 Perform CHANNEL CALI8 RATION. The 18 months Allowable Values shall be:
- a. TSV Closure: :s 7% closedi and
- b. TCV Fast Closure, Trip 011 Pressure-Low: 2: 465 psig.
1 SR' 3.3 4.1.3 Perform LOGIC SYSTEM FUNCTIONAL TEST, 18 months including breaker actuation.
SR 3.3.4.1.4 Verify TSV. Closure and TCV. Fast Closure, 18 months Trip 011 Pressure-Low Functions are not bypassed when THERMAL POWER is 2: 40% RTP.
i SR 3.3.4.1.5 --_---------------NOTE ---------------
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TheSTAGGEREDTESTB5SISFrequency shall be determined on a per Function basis.
Verify the EOC-IlPT SYSTEM RESPONSE TIME 18 months on a is within limits. STAGGERED TEST BASIS MT '
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- 3. .1.6 Determ' e RPT br ker in rupti _ time. j [0 mon 9602280083 960222 PDR ADOCK 05000461 P PDR CLINTON 3.3-27 Amendment No. 95
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Attachment 4 to U-602522 LS-94-004 ,
Page1of4 Attached Marked-Up Pages of the Technical Specification Bases f
b
Attcchment 4 to U-602522 LS-94-004
- Page 2 of 4 EOC-RPT Instrumentation B 3.3.4.1 BASES SURVEILLANCE SR 3.3.4.1.4 (continued) inoperable. Alternatively, the bypass channel can be placed REQUIREMENTS in the conservative condition (nonbypass). If placed in the i
"" nonbypass condition, this SR is met and the channel considered OPERABLE.
The Frequency of 18 months has shown that channel bypass failures between successive tests are rare.
SR 3.3.4.1.5 This SR ensures that the individual channel response times are less'than or equal to the maximum values assumed in the accident analysis. The E0C-RPT SYSTEM RESPONSE TIME acceptance criteria are included in applicable plant l pro'edures.
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- s u 1 ea nducted on an hote / )bquires STAGGERED EOC-RPT SYSTEM RESPONSE TEST BASIS Frequency to be de. i TIME i@'18 mon a per Function basis. This is accomplished by testing all channels of one i Function every 18 months on an alternating basis such that both Functions are tested every 36 months. This Frequency is based on the logic interrelationships of the various channels required to produce an E0C-RPT signal. Response-times cannot be determined at power because operation of final actuated devices is required. Therefore, this Frequency is consistent with the typical industry refueling cycle and is based upon plant operating experience, which shows that random failures of instrumentation components that cause serious response time degradation, but not channel failure, are infrequent occurrences.
(continued)
I l
l B 3.3-74 Revision No. 1-1 j CLINTON j j
4 .
- Attcchment 4 to U-602522 '
., LS-94-004
- Pcga 3 of 4 INSERT for TS Bases page B 3.3-74
@ Section 3.3.4.1.5 The EOC-RPT SYSTEM RESPONSE TIME includes an assumed RPT breaker interruption time of 95 milliseconds. The assumed RPT breaker intermption time is -
validated by the performance of periodic contact gap measurements and high potential
, tests on each breaker in accordance with plant procedures at least once per 36 months. i I
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Attachnent 4 to U-602522' LS-94-004
' Page 4 of 4 EOC-RPT Instrumentation B 3.3.4.1 BAS (L
- MI[4 4 c J )
/ A.3.4Q SU EILL CE QUIR ENTS (co inue I/his. ensur that th RPT bre er interr @tton tim ,
Iprov ed to e EOC-R SYSTEN SPONSE T i test. eak I lint rupt n time i defined Breaker esponse plus A Sup ession ti . Break Respon is the from plic ion of v tage to e trip 11 until e main ;
ont ts separ e Arc ppressi is the from i )
co act separ ion unt the c ete sup ession of he !
i e ctrical c acros he op contact The 60 th !
requenc f the t ting i ased on e diffic y of l perfo ng the e reliab tv of t circuit l
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REFERENCES 1. USAR, Section 7.6.1.8.
- 2. USAR, Section 5.2.2.
- 3. USAR, Sections 15.1.1, 15.1.2, and 15.1.3. !
- 4. USAR, Sections 15.2.2, 15.2.3, and 15.2.5.
- 5. USAR, Sections 15.3.2 and 15.3.3.
'6. GENE-770-06-1, " Bases for Changes To Surveillance Test Intervals And Allowed Out-Of-Service Times For Selected Instrumentation Technical Specifications,"
February 1991.
1 i
i i e
h B 3.3-75 Revision No. 0 CLINTON
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