ML20126C048
| ML20126C048 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 12/18/1992 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20126C023 | List: |
| References | |
| NUDOCS 9212220335 | |
| Download: ML20126C048 (10) | |
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ATTACHMENT A NPF-38-130 l
I 9212220335 921218 PDR ADOCK 05000382 P
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REACTIVITY CONTROL' SYSTEMS 3/4.1.3 HOVABLE CONTROL ASSEMBLIES i
CEA POSITION i
l LIMITING CONDITION FOR OPERATION i
1 CEAs-which are inserted in the core, shall be OPERABLE
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given group positioned within 7 inches (indicated position) of all other CEAs in its group.
I APPLICABILITY:
MODES 1* and 2*.
1 ACTION:
With one or more full-length CEAs inoperable due to being immovable 4
a.
as a result of excessive friction or mechanical interference or known to be untrippable, determine that the SHUTOOWN MARGIN require-ment 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 HOT STANOBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
b.
With more than one full-length or part-length CEA inoperable or i
misaligned from any other CEA in its group by more than 19 inches (indicated position), be in at least HOT STAN0BY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, With one full-length or part-length CEA misaligned from any other c.
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 l
Figure 3.1-1A and that within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the misaligned CEA is either:
1.
Restored to OPERABLE status within its above specified alignment requirements, or-l-
2.
Declared inoperable and the SHUTOOWN MARGIN requirement of j
Specification 3.1.1.1 is satisfied.
Af ter declaring.the CEA noperable, operation in MODES 1 and 2 may continue pursuant to the requirements of Specification 3.1.3.6:provided:
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a)
Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 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 limits shown on Figure '2 1-2; tn THERMAL POWER level shall be restricted pursuant-to Specification 3.1.3.6 during subsequent operation.
b)
The SHUTDOWN MARGIN requirement of Specification 3.1.1,1 1s 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, be in at least HOT STAND 8Y'within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
L "See Special Test Exceptions 3.10.2 and 3.10.4.
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WATERFORD - UNIT 3 i
3/4 1-18 AMENDMENT NO. II i
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REACTIVITY CONTROL SYSTEMS LIMITING CONDITION FOR OPERATION (Continued)
ACTION:
(Continueo) d.
With one or more full-length or part-length CEAs misaligned from any i
other CEAs in its group by more than 7 inches but less-than or equal-to 19 inches, operation in MODES 1 and 2 may continue, provided that core power is reduced in accordance with Figure 3.1-1A and that within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the misaligned CEA(s) is either:
1.
Restored to OPERABLE status within its above specified alignment-requirements, or 2.
Declared inoperable and the SHUTDOWN 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 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the remainder of the CEAs in the group with the inoperable CEA shall be aligned to within 7 inches of l
the inoperable CEA while maintaining the-allowable GA sequence and insertion limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted-pursuant to-Specification 3.1.3.6 during subsequent operation.
b)
The SHUTDOWN MARGIN requirement of Specification 3.1.1.1 l
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, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
With one full-length CEA inoperable due to:causes other than addressed e.
by ACTION a., above, and inserted beyond the Long: Term Steady State Insertion Limits but within its above specified alignment requirements, operation in MODES 1 and-.2 may continue pursuant to the requirements -
of Specification 3.1.3.6.
f.
With one full-length CEA inoperable due to.causes.other than addressed by ACTION a., above, but within its above specified alignment. require-ments and either greater than-or equal to 145 inches withdrawn or within the Long Term Steady State = Insertion Limits if in full-length CEA group 6, operation in MODES 1 and-2 may continue.
With one part-length CEA inoperable and inserted in the-core, g.
operation may' continue provided the alignment of-the inoperable part-length CEA is maintained within 7 inches (indicated position) of all other part-length CEAs in its group and the CEA is maintained pursuant to the requirements of Specification 3.1.3.7.
WATERFORD - UNIl 3 3/4 1-19 AMENDMENT NO. 11--
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REACTIVITY CONTROL SYSTEMS BASES 1
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BORATION SYSTEMS (Continued)
The contained water volume limits include allowance for water not available because of discharge line location, instrument tolerances, and other physical 4
characteristics.
The OPERABILITY of one boron injection system during REFUELING ensures I
that this system is available for reactivity control while.in MODE 6.
i The lower limit on the contained water volume, the specified boron concen-tration, and the physical size (approximately 600,000 gallons) of the RWSP also i
ensure a pH value of between 7.0 and 11.0 for the solution recirculated within containment after a LOCA.
This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caus'.ic stress corrcsion in mechanical systems and components, j
The maximum limit on the RWSP temperature ensures _ that the assumptions-used in the containment pressure analysis under design base accident condi-3 tions remain valid and avoids the possibility of containment overpressure.
The minimum limit on the RWSP temperature is required to prevent freezing and/
l or boron precipitation in the RWSP.
l 3/4.1.2.9 BORON DILUTION This specification is provided to prevent a boron dilution event, and to prevent a loss of SHUTDOWN MARGIN should an inadverteht boron dilution event Due to borun concentration requirements for the RWSP and boric acid occur.
makeup tanks, the only possible boron dilution that would remain undetected by the operator occurs from the primary makeup water through the:CVCS system.
Isolating this potential dilution path or the OPERABILITY of the startup channel high neutron flux-alarms, which alert the operator with sufficient
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time available to take corrective action, ensures that no loss of SHUTOOWN l_
MARGIN and unanticipated criticality occur.
I The ACTION requirements specified in the event startup channel high neutron i
flux alarms are inoperable provide an alternate means to detect boron dilution
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by monitoring the RCS boron concentration to' detect any changes.
l-The frequen-cies specified in Tables _3.1-1 through 3.1-5 provide 1the operator sufficient time to recognize a decrease in boron concentration and take appropriate.correc-
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l tive a: tion without loss of SHUTOOWN MARGIN.
More frequent checks are required with more charging pumps in operation due to the higher potential boron dilution
- rate, The surveillance requirements specified provide assurance that the startup-i channel high neutron flux alarms remain OPERABLE and that ree~ ired valve and-electrical lineups remain in effect, j
3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1)) acceptable power
' distribution-limits are maintained i
, (2) the minimum SHUTDOWN MARGIN is 1
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WATERFORD_- UNIT _3 B 3/4 1-3 AMENDMENT NO. 9:
4 REACTIVITY CONTRCL SYSTEM _S BASES MOVABLE CONTROL ASSEMBLIES (Continued) maintained, and (3) the potential effects of CEA misalignments are limited to acceptable levels.
The ACTION statements which permit limited variations from the basic requirements are accompanied by additional restrictions which cnsure that the original oesign criteria are met.
The ACTION statements applicable to a stuck or untrippable CEA, to two or more inoperable CEAs and to a large nisalignment (greater than or equal to 19 inches) of two or more CEAs, require a prompt shutdown of the reactor siace either of 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.
For small misalignments (less than 19 inches) of the CEns, there is (1) a small effect on the time dependent long-term power dirtributions relative to those useo in generating LCOs and L555 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 statement associated with small misalignments of CEAs permits a 1-hour time interval.uring which attempts may be made to restore the CEA to within its alienment requirements.
The 1-hour time limit is sufficient to (1) identify causes of a misaligned CEA, (2) take appropriate corrective action to realign the CEAs, and (3) minimize the effects of xenon redistribution.
^
The CPCs provide protection to the core in the event of a large misalignment (greater than or equal to 19 inches) of a CEA by applying appropriate penalty factors to the calculation to account for the misaligned CEA.
However, this misalignment would cause distortion of the core power distribution.
This
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distribution may, in turn, have a significant effect on (1) the available SHUTDOWN MARGIN, (2) the time-dependent long-term power distributions relative to those used in generating LCOs and L555 setpoints, and (3) the ejected CEA worth used in the safety analysis.
Therefore, the ACTION statement associated with the large misalignment of a CEA requires a prompt realignment of the misalignec CEA.
The ACTION statements aoplicable to misaligned or inoperable CEAs include requirements to align the OPERABLE CEAs in a given group with the inoperable CEA.
Conformance with these alignment requirements bring the core, within a short period of time, to a configuration consistent with that assumed in generating LCO and LSSS setpoints.
However, extended operation with CEAs significantly inserted in the core may lead to perturbations in (1) local burnup, (2) peaking factors, and (3) available SHUTDOWN MARGIk which are more adverse than the conditions assumed to exist in the safety analyses and LCO and LSSS setpoints determination.
Therefore, time limits have been imposed on operation with inoperable CEAs to preclude such adverse conditions from developing.
Operability of at least two CEA position indicator channels is required to determine CEA positions and thereby ensure compliance with the CEA alignment and insertion limits.
The CEA " Full In" and " Full Out" limits provide an additional independent means for determining the CEA positions whea the CEAs are at either their fully inserted or fully withdrawn positions.
Ther ef ore, the ACTION statements applicable to inoperable CEA position indicators permit WATERFORD - UNIT 3 8 3/4 1-4
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ATTACHMENT B NPF-38-130 4
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REACTIVITY CONTROL SYSTEMS 3/4.1.3 MOVABLS CONTROL ASSEMBLIES CEA POSITION A
LIMITINO CONDITION FOR OPERATION 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 : MODES 1* and 2*.
1 ACTION :
s a.
With one or more full-length CEAs inoperable due to being immovable as a result of excessive friction or mechanical interference or known to be untriPrable, determine that the SHUTDOWN MARGIN 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 HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
b.
With more than one full-length or part-length CEA trippable but ADD REMOVE isoperah4e-oa-misaligned f rom any other CEA in its group by more than 19 inches (indicated position), be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
c.
With one full-length or part-length CEA trippable but misaligned ADD from any 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 that within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the misaligned CEA ts either:
1.
Restored to OPERABLE status within its above specified alignment requirements, or 2.
Declared inoperable and the SHUTDOWN HARGIN 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 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 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 limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent i
operation.
b)
The SHUTDOWN 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 />.
Othe rwise, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
r
- Sae Special Test Exceptions 3.10.2 and 3.10.4.
WATERFORD - UNIT 3 3/4 1-18 i
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i REACTIVITY CONTROL SYSTEMS i
t LIMITING CONDITION FOR OPERATION ACTION: (Continued) d.
With one or more full-length or part-length CEAs trippable but ADD misaligned from any other CEAs in its group by more than 7 inches but less than or equal to 19 inches, operation in MODES 1 and 2 may continue, provided that core power is reduced in accordance with Figure 3.1-1A and that within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the misaligned (CEA)(s) is either:
1.
Restored to OPERABLE status within its above specified alignment requirements, or 2.
Declared inoperable and the SHUTDOWN MARGIN requirement of Specification 3.1.1.1 is satisfied.
Af ter declaring the CEA inoperable, operation in HODES 1 and 2 may continue pursuant to the requirements of Specification 3.1.3.6 provided:
a)
Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> the remainder of the CEAs in the group with the inoperable CEA snall be aligned to within 7 inches of the inoperable CEA while maintaining the allowable CEA sequence and insertion limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation, b)
The SHUTDOWN 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 />.
Ot he rwis e, be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
ADD e.
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 within its above specified alignment requirements, operation in MODES 1 and 2 may continue pursuant to the requirements of specification 3.1.3.6.
f.
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 greater than or equal to 145 inches withdrawn or within the Long Term Steady State Insertion Limits if in full-length CEA group 6, operation in MODES 1 and 2 may continue.
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With one part-length CEA inoperable and inserted in the core, operation may continue prov4ded the alignment of the inoperable part length CEA is maintaineid within 7 inches (indicated position) of all other part-length CEA s in its group and the CEA is maintained pursuant to the rt quirements of Specification 3.1.3.7 h.
With more then one f ull~ length or part length CEA trippable but inoperable due ta causes other then addressed by ADD ACTION a.,
- above, restore the inoperable CEAs t> 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 HOT STANDBY within the-next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
1 WATERFORD - UNIT 3 3/4 1-19
REACTIVITY CONTROL SYSTEMS pASES BORATION SYSTEMS (Continued)
The contained water volume limits include allowance for water not available because of diccharge line location, instrument tolerances, and other physical characteristics.
The OPERABILITY of one boron injection system during REFUELING ensures that this syctem is available for reactivity control while in MODE 6.
The lower limit on the contained water volume, the specified boron concen-tration, and the physical size (approximately 600,000 gallons) of the RWSP also ensure a pH value of between 7.0 cnd 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 systens and components.
The maximum limit on the RWSP temperature ensures that the assumptions us:d in the containment pressure analysis under design base accident condi-tiens remain valid and avoids the possibility of containment overpressure.
The cinimum limit on the RWSP temperature is required to prevent freezing and/
or baron precipitation in the RWSP.
3/4.1.2.9 BORON DILUTION This specification is provided to prevent a boron dilution event, and to prevent a loss of SHUTDOWN-MARGIN should an inadvertent boron dilution event occur.
Due to boron concentration requirements for the RWSP and boric acid enkcup tanks, the only possible boron dilution that would remain undetected by ths operator occurs from the primary makeup water through the CVCS system.
Isolating this potential dilution path or the OPERABILITY of the startup ch:nnel high neutron flux alarms, which alert the operator with sufficient tics available to take corrective action, ensures that no loss of SHUTDOWN MARGAN and unanticipated criticality occur.
The ACTION requirements specified in the event startup channel high neutron flux alarms are innparable provide an alternate means to detect boron dilution by tenitoring the RCS boron concentration to detect any changes. The frequen-clos specified in Table 3.1-1 through 3.1-5 provide the operator sufficient-tito to recognize a decrease in boron concentration and take appropriate correc-tive action without loss of SHUTDOWN MARGIN.
More frequent checks are required with more charging pumps in opsration due to the higher potential boron _ dilution rate.
The surveillance requirements specified provide assurance that. the startup channel high n utron flux alarms remain OPERABLE and that required valve and electrical lineups remain in sffset.
3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power dictribution limits are maintained, (2) the minimum SKUTDOWN HARGIN is WLtorford - UNIT 3 B 3/4 1-3 f
REACTIVITY CONTROL SYSTEMS BASES MOVABLE CONTROL ASSEMBLIES (Continued 1 naintcined, and (3) the potential effects of CEA misalignments are limited to ccccptchle levels.
The ACTION statements which permit limited variations from the basic rcquircments are accompanied by additional restrictions which ensure that the original design criteria are met.
The ACTION statements applicable to a stuck or untrippable CEA, to-bwe or REMOVE more-4noperable-CEAs-and to a large misalignment (greater than or equal to 19 inches) of two or more CEAs, require a prompt shutdown of the reactor since oith3r of 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 ' confirmed ' to be~ inoperable ADD due to probleas' other then -addressed by ACTION a. - of TS 3.1.3.1_- and that are trippable, will not impact SHUTDOWN MARGIN as--long-as their_ relative positions satisfy the applicable-alignment requirements.
For small mistlignments (less than 19 inches) of the CEAs, there is (1) a s2all effect on the time dependent long-term power distributions relative to thoso used in generating LCOs and LSSS setpoints, (2) a small effect on the cvoilcble SHUTDOWN MARGIN, and (3) a small effect on the ejected CEA worth used in tha safety analysis. Therefore, the ACTION statement associated with trippable but small misalignments of CEAs permits a 1-hour time interval ADD during which attempts may be made to restore the CEA to within its alignment requirements. The 1-hour time limit is sufficient to (1) identify causes of a cicoligned CEA, (2) take appropriate corrective action to realign the CEAs, end (3). minimize the effects _of_. xenon redistribution. Problems may also'cause ADD more then>one control' rod'to be immovable ~where the' control: rods-continue to be trippable. With-trippable but multiple inoperable rods: the alignment limits and restriction on THERMAL POWER-in accordance with the provisions of Specification'3.1.3.6 for insertion-limits,zassures-fuel rod-integrity during continued operation. These provisions are sufficient to allow 72-hours to restore the inoperable rods 'to operable status when it :is confirmed that the c~use of the immovable rods in an electrical-problem in the rod control rvotem or an electrical or mechanical - problem with-the rod stepping mechanism exclusive of'the rod holding coil'that must function for a - reactor ~ trip. In such cases, the control rods will continue to be-capable of fulfillino-their primary safety _ function.
The CPCs provide protection to the core in the event of a large misalign-c:nt (greater than or equal to 19 inches) of a CEA by applying appropriate penalty facters to the calculation to account for the misaligned CEA. However, this cicolignment would cause distortion of the core power distribution. This distribution may, in turn, have a significant effect on (1)the available SHUTDOWN MARGIN, (2) the time-dependent long-term power distributions relative to th:se used in generating LCOs and LSSS setpoints, and (3) the ejected CEA worth used in the safety analysis. Therefore, the ACTION statement associated with the large misalignment of a CEA requires a prompt realignment of the cicoligned CEA.
The ACTION statements applicable to trippable'but misaligned or ADD
_innparable CEAs include requirements to align the OPERABLE CEAs in a given group with the inoperable CEA.
Conformance with these alignment requirements bring the core, within a short period of time, to a configuration consistent with that assumed in generating LCO and LSSS setpoints.
However, extended operation with CEAs cignificantly inserted in tho core may lead to perturbations in (1) local burnup, (2) peaking factors, and (3) available SHUTDOWN MARGIN which are more adverse than the conditions assumed to exist in the safety analyses and LCO and LSSS setpoints determination.
Thorsfore, time limits have been imposed on operation with inoperable CEAs to preclude such cdverce conditions from developing.
WATERFORD - UNIT 3 B 3/4 1-4 THE REMAINDER OF THIS BASIS SECTION ADDRESSES SPECIFICATIONS OTHER THEN TS 3.1.3.1 AND ARE NOT REPEATED HERE.