ML20029C304
| ML20029C304 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 03/20/1991 |
| From: | WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | |
| Shared Package | |
| ML20029C303 | List: |
| References | |
| NUDOCS 9103270142 | |
| Download: ML20029C304 (6) | |
Text
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Attactuent IV to ET 91-0051 Page 1 of 6 ATTACIMENT IV PROPOSED TEC11NICAL SPECIFICATION CIIANGES l
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l 9103270142 9103'20 PDR ADOCK0500g2 l
Attachment IV to ET 91-0051 Page 2 of 6 l
REACTIVITY CONTROL SYSTEMS 3/4.1.3 MOVABLE CONTROL ASSEMBLIES GROUP HEIGHT
.LiHITING CONDITION FOR OPERATION 3.1.3.1 aAll full-length-shutdcwn and control ross shall be OPERABLE and positioned within i 12 steps (indicated position) of their group step counter demand position, APPLICABILITY: MODES 18 and 2*
ACTION: The ACTION to be taken is bhsed on the cause of inoperability of contiCl rods as follows:
ACTION More Than-CAUSE OF INOPERABILITY.
One Rod One Rod a)
Immovable as a result of excessive (1).
'(1) friction or mechanical interference or known to be untrippable, i
b)
Hisaligne: from its group step
-(3)
(2)-
7 counter demand height or from any I
other rod.in its group by more than
.t 12 steps (indicated position).
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. c)
Inoperable due to i rod control urgent (4)
(4)
[
failure alarm or other electrical problem in the rod control system, l
but trippable.
ACTION 1 - Determine that the SHUTDOWN'HARGIN requirement of Specification 2.1.1.1 is satisfied withinL1 hour and be in HOT STANDBY-within S hours; ACTION 2 - Be in HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
ACTION POWER OPERATION may continue provided that within 1 hour:
1.
The rod is restored to OPERABLE' status within the above alignment requirements, or.
2.
The rod is declared inoperable and the remainder of the rods in the group with the inoperable rod are aligned to within i 12 steps of the inoperable rod while maintaining the_._ rod
. sequence and insertion limits of(liguref_'3.1-1.:nd 0.1-22) The Tl!ERMAL POWER level shall be restricted pursuant to Specifica-tion 3.1.3.6 during subsequent operation, or "See Special Test Exceptions Specifications 3.10.2 and 3.10.3.
1 WOLF CREEK - UNIT 1 3/4 1-14 Amendment No. 27
- ' Attachment IV to ET 91-0051 Page 3 of 6
' REACTIVITY CONTROL SYSTEMS
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PJSITION INDICATION SYSTEMS-0PERATING LIMITING CONDIT10N FOR OPERATION 3.1. 3. 2 The Digital Rod Position Indication System and the Oemand Position Indication System shall be OPERABLE and capable of determining the control rod positions within i 12 steps.
APPLICABILITY: MODES 1 and 2.
ACTION:
a.
With a maximum of one digital rod position inoicator per bank inoper-able either:
1.
Determine the position of the nonindicating rod (s) indirectly by the movable incore detectors at luast once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and immediately after any motion of the nonindicating rod which exceeds 24 steps in one direction since the last determination -
of the rod's position, or l
2.
Reduce THERMAL POWER to less than 50% of RATED THERMAL POWER within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
l dnserth h 6.
With a maximum of one demand position indicator per bank inoperable either:
1.
Verify that all digital rod position indicators for the affected bank are OPERABLE and that the most withdrawn rod and the least withdrawn rod of the bank are within a maximum of'12 steps of each other at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, or 2.
Reduce THERMAL POWER to less than 50% of RATED THERMAL POWER within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.1.3.2 Each digital rod position indicator shall be determined to be OPERABLE by verifying that the Decand Position Indication System and the Digital Rod Position Indication System agree within 12 steps at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> except during time intervals when the rod position deviation monitor is-inoper-able, then compare the Demand Position Indication System and the Digital Rod l
Position Indication System at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
WOLF CREEX - UNIT 1 3/4.1-17
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Attachment IV to ET 91 0051 i
Page 4 of 6 INSERT A b.
Wizh more than one digitc1 rod position indicator per bank inoperable either:
1.a)
Determine sne position of the nonindicating rode indirectly by the movable incore detectors at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and immediately after any motion of the nonindicacing rod which exceeds 24 steps in ons direction since the last determination of the rod's position, and b)
Place the control rods under manual control, and c) Honitor and record Reactor Coolant System average temperature (7,yg) et least once per hour, and u
Restore the digital rod position indicators to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> such that a maximum of one digital rod position indicator per bank is inoperable, or 2.
Be in 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 />.
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Attachmer(,V to ET 91-0051 Page 5 ;f 6 REACTIVITY CONTROL $YSTEMS BA$ES mvABLE CONTROL ASSEMBl!ES (Continued) for pt.ry nes of determining compliance with.,,ecification 3.1.3.2, any imovability of a control rod invokes ACTION Statement 3.1.3.1.a.
Before
_utilizf ng ACfl0N Statement 3.1.3.1.c. the rod control urgent f ailure alarm must to illuminated or an electrical probles must be detected in the rod control system. The rod is considered trippable if the rod was demonstrated OPERABLE durin0 the last performance of Surveillance Requirement 4.1.3.1.2 and met the rod drop time criteria of Specification 3.1.3.4 during the last perforvance of Surveillance Requirement 4.1.3.4.
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. Misalignment of a rod requires measurement of peaking facters and a restriction in THERMAL POWER. These restrictions provide assurene of fuel rod integrity during continued operation.
In addition, those safety :pJ1yses affected by a misaligned rod are reevaluated to confirm that the resuhi, remain valid during future operation.
(Insert f0 ine maximum rod drop time restriction is consistent with the assumed rod drop time used in the safety analyses. >6easurement with T,yg greater than or equal to 551*F and with all reactor coolant plumps operating ensures that the i
measured drop times will be representative of insertion times experienced during a Reactor trip at operating conditions.
Control rod positions and OPERABILITY of the rod position indicators are required to be verified on a nominal basis of once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frequent verifications required if an automatic monitoring channel is inoperable.
i These verification frequencies are adequate for assuring that the applicable tCOs are satisfied.
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l WLF CREEK ' UNIT 1 B 3/4 1-4'~
- Amendmet* No. 27
-Attachment IV to ET 91-0051 Page 0 of 6 IN.9ERT B The power reduction and shutdown time limits given in ACTION statements 3.1.3.z.a.2. 3.1.3.2.b.2 and 3.1.3.2.c.2 respectively, are initiated at the time of discovery that the compensatory actions required for POWER OPERATION can no longer be met.
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