ML20072S341
| ML20072S341 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/09/1991 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20072S334 | List: |
| References | |
| NUDOCS 9104150119 | |
| Download: ML20072S341 (5) | |
Text
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PROPOSED TECilNICa!, SPECIFICATI09 r"*"GE i Ji
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REACTIVITY CONTROL SYSTEMS 3/4.1.3 1 Q /ABLE CONTRQh_ ASSET 1HEIES CM_ POSITION LIMLUtiG_GON1LU0tiJ01L NEan0L 3.1.3.1 All full length (shutdown and regulating) CEAs, and all part length CEAs which are inserted in the core, shall be OPERABLE with each CEA of a given group positioned within 7 inches (indicated position) of all other CEAs in its group.
APPLICABILITY:
HODES 1* and 2*,
AGUDE:
a.
With one or more full length CEAs inopere.ble due to being immovable as a result of excessive friction or mechanical interference or known to be untrippable, determine that the SilUTDOWN HARGIN requirement of Specification 3.1.1.1 is satisfied within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and be in at least il0T STAND 3Y within 6 h
hours.
t b.
With one full length CEA inoperable due to causes other than addressed by ACTION a, above, and inserted beyond the Long Term Steady State Insertion Limits but rithin its above specifjed alignment requirements, operation in HODES 1 and 2 may continue pursuant to the requirements of Specification 3.1.3.6.
c.
With one full length CEA inoperable due to causes other than addressed by ACTION a, above, but within its above specified alignment requirements and either fully withdrawn or within the Long Term Steady Stato insertion Limits if in full length CEA group 6, operation HODES 1 and 2 may continue.
d.
With more than one full length or part length CEA(s) Inoperable due to an electronic or electrical problem in CEDMCS, but within the above specified alignment requirements, restore the inoperable CEA(s) to OPERABLE status 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 110T STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. The requirements of Specification 3.1.3.6 and 4.1,3.1.2 shall also be mainta ined.
e.
With one or more full length or part length CEAa nisaligned l
from any other CEAs in its group by more than 7 inches but less than e equal to 19 inches, oport.tlon in H0 DES 1 and 2 may continue, provided that core power is reduced In accordance with Figure 3.1 ti and within i hour the misaligned CEA(s) is either:
1.
Restored to OPERABLE status within its above soecified alignment requirements, or
- See Special Test Exceptions 3.10.2 and 3.10.4.
ARKANSAS - UNIT 2 3/4 1-17
.'enndront No. 79,
MACIIVITY CONTROL _ SYSTEMS KH08:
(Canianued).
2.
Declared inoperable and the SilUTDOWN MARGIN requirement of Specification 3.1.1.1 is satisfied.
Af ter declaring the CEA inoperable, operation in MODES 1 and 2 may continue pursuant to the requirements of Specification 3.1.3.6 provided:
a)
Within one hour the remainder of the CEAs in the group with the inoperable CEA shall be aligned to with.in 7 inches of the inoperabic CEA while maintaining the allowable CEA sequence and insertion limits shown on Figure 3.1-2; the THERMAL p0WER level shall be restriuced pursuant to Specification 3.1.3.6 during subsequont operation.
b)
The SiiUTDOWN MARGIN requirement of Specification 3.1.1.1 is determined at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
Otherwise, bo in at least HOT STANDilY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
f.
With one full length or part length CEA misa11gned from any I
3 other CEA in its group by more than 19 inches, operation in MODES 1 and 2 may continue, provided that core power is reduced in accordance with Figure 3.1-1A and within one hour, the l
.nisa11gned CEA is ofthor:
1.
Rostored to OPERABLE status within it's above specified alignment requirtments, or 2.
Declared inoperable and the SIIUTDOWN MARGIN requirement of Specification 3.1.1.1 is satisfied. After declaring the CEA inoperable, operation in MODES 1 and 2 may continue pursuant to the requirements of Specification 3.1.3.6 provided:
a)
Within one hoar the remainder of the CEAs in the group with the inoperable CEA shall be aligned to within 7 inches of the inoperable CEA while maintaining the allowable CEA sequence and insertion 1(Cts shown on Figure 3.1-2;-the THERMAL p0WER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation, b)
The SilVTDOWN MARGIN -requirement of Specificat.lon 3.1.1.1 is determined at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
j Othe rw is e, be.in at least 110T STANDilY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
ARKANSAS - UNIT 2 3/4 1-18 hmendment No. 79
1
' REACTIVITY CONTROL SYSTEMS A.CTION:
(C_ontinued]
g.
With one part length CEA inoperable and inserted in the c.are, l
operat. ion may continuo provided the alignment of the inoperabie PLCEA ir maintained within 7 inches (indicated position) of all other PL0EAs in its group, h.
Whh more then one full longth or part length CEA inoperable for causes other than addressed by ACTION d, or misaligned from an r other CEA in it s group by more than 19 inches (indicated pos ition), he in at least il0T STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
MREJ.RMCLREQVIEMEUs 4,1.3.1.1 The position of each full longth and part length CEA shall be determined to be within 7 inches (Indicated position) of all other CEAs in its group at least enco por 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
4.1.3.1.2 Each full length CEA not fully inserted and each part length CEA which is inserted in the core shall be determined to be OPERABLE by movement of at least 5 inches in any one direction at least once por 31 days.
ARKANSAS - UNIT 2 3/4 1-19 Amendment No. 70,
' REAGTIVITY CONTROL SYSTFJiS l
R6 SIS The boron capability required below 200 F is hassd upon providing a 5% Ak/k SHUTDOWN MARGIN af ter xenon decay and cooldow, from 200 F to 140*F.
This condition requires either borated watet ft w the refueling water tank or boric acid solution from the boric acid me.keup tank (s) in accordance with t.he requirements of Specification 3.1.2.7.
The contained water volume limits includes allowance for water not available because of discharge line location and other physical characteristics.
The 61,370 gallon limit for the refueling water tank is based upon having an indicated level in the tank of at least 7.5%.
The OPERABILITY of one boron injection system during REFUElJNG ensures that this system is available for reactivity control while in MODE 6.
The limits on contained water volume and boron concentration of the RWT also ensure a pH value of between 8.8 and 11.0 for the solution recirculated within containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the ef fect of chloride and caustic stress corrosion on mechanical systems and components.
3/4.1.3 MOVABJ.E CONTROL _/LMEl]DLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) the potential ef fects of CEA misalignments are limited to acceptable levels.
A full length or part length CEA is considered trippable if the CEA was demonstrated OPERABLE during tne laat performance of Surveillance Requirement 4.1.3.1.2 and met the CEA drop time criteria Specification 3.1.3.4 during the last performance of Surveillance Requirement 4.1.3.4.
A CEA can be assumed to be trippable until CEA traces indicate otherwise.
The ACTION statements which permit limited variations from the basic requirements are accompanied by additional restrictions which ensure that the original design criteria are met.
The ACTION statements applicable to a stuck or untrippable CEA and to a large misalignment (2 19 incher.) of two or more CEAs, require a prompt shutdown of the reactor since any cf these conditions may be indicative of a possible loss of mechanical functional capability of the CEAs and in the event of a stuck or untrippable CEA, the loss of SHUTDOWN MARGIN.
CEAs that are inoperable due to CEDMCS problems are assumed to remain trippable and will not impact SHUTDOWN MARGIN as long as their relative positions satisfy the applicable alignment requirements.
For small misalignments (< 19 inches) of the CEAs, there is 1) a small ef fect on the time dependent long term power distributions relative to those used in generating LCOs and LSSS setpoints, 2) a small effect on the available SHUTDOWN MARGIN, and 3) a small effect on the ejected CEA worth used in the safety analysis.
Therefore, the ACTION ARKANSAS - UNIT 2 B 3/ ', 1-3 Amendment No. /A, 62,
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