L-PI-20-051, Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements

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Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements
ML20272A239
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 09/28/2020
From: Sharp S
Xcel Energy
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
EPID: L-2019-LLA-0295, L-PI-20-051
Download: ML20272A239 (27)
v • d • e


Text

fl Xcel Energy 1717 Wakonade Drive Welch, MN 55089 September 28, 2020 L-PI-20-051 10 CFR 50.90 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant, Units 1 and 2 Docket Nos. 50-282 and 50-306 Renewed Facility Operating License Nos. DPR-42 and DPR-60 Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, "Clarification of Rod Position Requirements" (EPID: L-2019-LLA-0295)

References:

1. Letter L-PI-19-041 from NSPM to the NRC, Application to Revise Technical Specifications to Adopt TSTF-547, Clarification of Rod Position Requirements", dated December 23, 2019. (ADAMS Accession No. ML19357A142)

In Reference 1, Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (hereafter NSPM), requested an amendment to the Technical Specifications (TS) for the Prairie Island Nuclear Generating Plant (PINGP), Units 1 and 2, pursuant to 10 CFR 50.90. Reference 1 included eight site-specific variations, but subsequent internal review identified that two changes denoted in the TS markup pages and clean pages for LCO TS Limiting Condition for Operability (LCO) 3.1.4, Rod Group Alignment Limits, and LCO 3.1.7, Rod Position Indication, provided with Reference 1 were not identified as variations.

This supplement will address those variations as well as provide related editorial corrections to the markups, TS clean pages, and TS Bases markups in the Attachments to this supplement.

Additional Variations The additional variations do not impact the No Significant Hazards Determination or the Environmental Considerations of Reference 1. Further, the two additional variations do not affect the applicability of TSTF-547 or the NRC staff's safety evaluation of the TSTF with respect to the proposed license amendment. NSPM proposes the following two variations in addition to the eight provided with Reference 1:

  • PINGP TS LCO 3.1.4 includes a note that is not in the TSTF-547 LCO 3.1.4. This note addresses that a rod position indicator (RPI) may incorrectly indicate misalignment following rod movement until the RPI returns to thermal equilibrium. NSPM proposes to

Document Control Desk Page 2 maintain this note , but to modify it to be consistent with the TSTF and the note added to SR 3.1.4.1 to address time allowed for thermal equilibrium of analog RPls.

Th is note addresses that an RPI may incorrectly indicate misalignment following rod movement until the RPI returns to thermal equilibrium. Specifically, the note is worded differently and NSPM proposes to use the TSTF-547 version of the note . provides page replacements for the TS page markups provided in Reference 1 for LCO 3.1.4 and LCO 3.1.7 including removing an erroneous markup of the alignment of one logical connector in TS 3.1.4, Condition B. Attachment 2 provides the revised clean TS pages for LCO 3.1.4 and LCO 3.1.7 along with the final clean pages for LCO 3.1.5 and LCO 3.1.6 . provides two updated pages for the previously provided TS Bases page markups , one each for LCO 3.1.4 and LCO 3.1. 7 (provided for information only).

Please contact Mr. Jeff Kivi at (612) 330-5788 or Jeffrey.L.Kivi@xcelenergy.com if there are any questions or if additional information is needed .

Summary of Commitments This letter makes no new commitments and no revisions to existing commitments.

I declare under penalty of perjury, that the foregoing is true and correct.

Executed on September 28 , 2020.

- ~

Scott Sharp Site Vice President, Prairie Island Nuclear Generating Plant Northern States Power Company - Minnesota Attachments (3) cc: Administrator, Region Ill , USNRC Project Manager, Prairie Island , USNRC Resident Inspector, Prairie Island , USNRC State of Minnesota

ATTACHMENT 1 PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, "Clarification of Rod Position Requirements" TECHNICAL SPECIFICATION PAGES (Markup)

Revised LCO 3.1.4 and LCO 3.1.7 (3 Pages Follow)

Rod Group Alignment Limits 3.1.4 3.1 REACTIVITY CONTROL SYSTEMS 3.1.4 Rod Group Alignment Limits.

LCO 3.1.4 All shutdown and control rods shall be OPERABLE.

AND Individual actual rod positions shall be within 24 steps of their group step counter demand position when the demand position is between 30 and 215 steps, or within 36 steps of their group step counter demand position when the demand position < 30 steps, or > 215 steps.

NOTE-----------------------------------------

Individual RPIs may be outside their limits for < 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> following substantial rod movement. movement of the associated rods.

APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more rod(s) A.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable. limits provided in the COLR.

OR A.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND A.2 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Prairie Island Unit 1 - Amendment No. 158, 160 Units 1 and 2 3.1.4-1 Unit 2 - Amendment No. 149, 151

Rod Group Alignment Limits 3.1.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One rod not within B.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> alignment limits. limits provided in the COLR.

OR B.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND B.4 B.2.1.1 Perform SR 3.2.1.1 and 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> SR 3.2.1.2. , and SR 3.2.2.1.

AND 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> B.2.1.2 Perform SR 3.2.2.1. 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> OR THERMAL POWER B.2.2 Reduce High Neutron 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Flux Trip Setpoint to

< 85% RTP.

AND 75 B.3 Verify SDM is within the Once per limits provided in the 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> COLR.

AND Prairie Island Unit 1 - Amendment No. 158 Units 1 and 2 3.1.4-2 Unit 2 - Amendment No. 149

Rod Position Indication 3.1.7 3.1 REACTIVITY CONTROL SYSTEMS 3.1.7 Rod Position Indication LCO 3.1.7 The Rod Position Indication (RPI) System and demand position indication shall be OPERABLE.

NOTE-----------------------------------------

Individual RPIs may be outside their limits for < 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> following substantial rod movement.

APPLICABILITY: MODES 1 and 2.

Individual RPIs are not required to be OPERABLE for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> following movement of the associated rods.

ACTIONS RPI

NOTE--------------------------------------------------

Separate Condition entry is allowed for each inoperable rod position indicator and each demand position indicator.

CONDITION REQUIRED ACTION COMPLETION TIME A. One RPI per group A.1 Verify the position of the Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> inoperable for one or rod(s) with inoperable RPI indirectly more groups. position indicators by using core power distribution in measurement information.

Insert F OR A.2 3 Reduce THERMAL 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> POWER to < 50% RTP.

Prairie Island Unit 1 - Amendment No. 158, 160 201 Units 1 and 2 3.1.7-1 Unit 2 - Amendment No. 149, 151 188

ATTACHMENT 2 PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, "Clarification of Rod Position Requirements" TECHNICAL SPECIFICATION PAGES (Re-typed)

Revised LCO 3.1.4, LCO 3.1.5, LCO 3.1.6, and LCO 3.1.7 (16 Pages Follow)

Rod Group Alignment Limits 3.1.4 3.1 REACTIVITY CONTROL SYSTEMS 3.1.4 Rod Group Alignment Limits.

LCO 3.1.4 All shutdown and control rods shall be OPERABLE.

AND Individual actual rod positions shall be within 24 steps of their group step counter demand position when the demand position is between 30 and 215 steps, or within 36 steps of their group step counter demand position when the demand position < 30 steps, or > 215 steps.

NOTE--------------------------------------------

Individual RPIs may be outside their limits for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> following movement of the associated rods.

APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more rod(s) A.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable. limits provided in the COLR.

OR A.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND A.2 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.4-1 Unit 2 - Amendment No. 221

Rod Group Alignment Limits 3.1.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One rod not within B.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> alignment limits. limits provided in the COLR.

OR B.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND B.2 Reduce THERMAL 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> POWER to < 75% RTP.

AND B.3 Verify SDM is within the Once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> limits provided in the COLR.

AND B.4 Perform SR 3.2.1.1, 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> SR 3.2.1.2, and SR 3.2.2.1.

AND B.5 Re-evaluate safety 30 days analyses and determine the THERMAL POWER for which the results remain valid for duration of operation under these conditions.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.4-2 Unit 2 - Amendment No. 221

Rod Group Alignment Limits 3.1.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME C. Required Action and C.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition B not met.

D. More than one rod not D.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> within alignment limit. limits provided in the COLR.

OR D.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> required SDM to within limit.

AND D.2 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.4-3 Unit 2 - Amendment No. 221

Rod Group Alignment Limits 3.1.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.4.1 -------------------- NOTES--------------------------------

1. Not required to be performed for rods associated with inoperable rod position indicator or demand position indicator.
2. Not required to be performed until 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after associated rod motion.

Verify position of individual rods within alignment In accordance with limit. the Surveillance Frequency Control Program SR 3.1.4.2 Verify rod freedom of movement (trippability) by In accordance with moving each rod, not fully inserted in the core, the Surveillance

> 10 steps in either direction. Frequency Control Program SR 3.1.4.3 Verify rod drop time of each rod, from the fully Prior to reactor withdrawn position, is < 1.8 seconds from the criticality after beginning of decay of stationary gripper coil voltage each removal of to dashpot entry, with: the reactor head

a. Tavg > 500°F; and
b. Both reactor coolant pumps operating.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.4-4 Unit 2 - Amendment No. 221

Shutdown Bank Insertion Limits 3.1.5 3.1 REACTIVITY CONTROL SYSTEMS 3.1.5 Shutdown Bank Insertion Limits LCO 3.1.5 Each shutdown bank shall be within insertion limits specified in the COLR.

NOTE-----------------------------------------

Not applicable to shutdown banks inserted while performing SR 3.1.4.2.

APPLICABILITY: MODES 1 and 2.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One shutdown bank A.1 Verify all control banks 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inserted 10 steps are within the insertion beyond the insertion limits specified in the limits specified in the COLR.

COLR.

AND Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.5-1 Unit 2 - Amendment No. 221

Shutdown Bank Insertion Limits 3.1.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> limits specified in the COLR.

OR A.2.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND A.3 Restore the shutdown bank 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to within the insertion limits specified in the COLR.

B. One or more shutdown B.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> banks not within limits limits provided in the for reasons other than COLR.

Condition A.

OR B.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND B.2 Restore shutdown banks to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> within limits.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.5-2 Unit 2 - Amendment No. 221

Shutdown Bank Insertion Limits 3.1.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME C. Required Action and C.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time not met.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.5.1 -------------------------- NOTE ----------------------------

Not required to be performed until 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after associated rod motion.

Verify each shutdown bank is within the limits In accordance with specified in the COLR. the Surveillance Frequency Control Program Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.5-3 Unit 2 - Amendment No. 221

Control Bank Insertion Limits 3.1.6 3.1 REACTIVITY CONTROL SYSTEMS 3.1.6 Control Bank Insertion Limits LCO 3.1.6 Control banks shall be within the insertion, sequence, and overlap limits specified in the COLR.

NOTE--------------------------------------

Not applicable to control banks inserted while performing SR 3.1.4.2.

APPLICABILITY: MODE 1, MODE 2 with keff > 1.0.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. Control bank A, B, or A.1 Verify all shutdown banks 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> C inserted 10 steps are within the insertion beyond the insertion, limits specified in the sequence, or overlap COLR.

limits specified in the COLR. AND A.2.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> limits specified in the COLR.

OR Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.6-1 Unit 2 - Amendment No. 221

Control Bank Insertion Limits 3.1.6 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND A.3 Restore the control bank to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> within the insertion, sequence, and overlap limits specified in the COLR.

B. Control bank insertion B.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> limits not met for reasons limits provided in the other than Condition A. COLR.

OR B.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND B.2 Restore control bank(s) to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> within limits.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.6-2 Unit 2 - Amendment No. 221

Control Bank Insertion Limits 3.1.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME C. Control bank sequence or C.1.1 Verify SDM is within the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> overlap limits not met for limits provided in the reasons other than COLR.

Condition A.

OR C.1.2 Initiate boration to restore 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SDM to within limit.

AND C.2 Restore control bank 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> sequence and overlap to within limits.

D. Required Action and D.1 Be in MODE 2 with keff 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion < 1.0.

Time not met.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.6-3 Unit 2 - Amendment No. 221

Control Bank Insertion Limits 3.1.6 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.6.1 Verify estimated critical control bank position is Prior to within the limits specified in the COLR. achieving criticality SR 3.1.6.2 -------------------------- NOTE ----------------------------

Not required to be performed until 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after associated rod motion.

Verify each control bank insertion is within the limits In accordance with specified in the COLR. the Surveillance Frequency Control Program SR 3.1.6.3 -------------------------- NOTE ----------------------------

Not required to be performed until 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after associated rod motion.

Verify sequence and overlap limits specified in the In accordance with COLR are met for control banks not fully withdrawn the Surveillance from the core. Frequency Control Program Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.6-4 Unit 2 - Amendment No. 221

Rod Position Indication 3.1.7 3.1 REACTIVITY CONTROL SYSTEMS 3.1.7 Rod Position Indication LCO 3.1.7 The Rod Position Indication (RPI) System and demand position indication shall be OPERABLE.

NOTE--------------------------------------------

Individual RPIs are not required to be OPERABLE for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> following movement of the associated rods.

APPLICABILITY: MODES 1 and 2.

ACTIONS

NOTE--------------------------------------------------

Separate Condition entry is allowed for each inoperable RPI and each demand position indicator.

CONDITION REQUIRED ACTION COMPLETION TIME A. One RPI per group A.1 Verify the position of the Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> inoperable in one or more rod with inoperable RPI groups. indirectly by using core power distribution measurement information.

OR Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.7-1 Unit 2 - Amendment No. 221

Rod Position Indication 3.1.7 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2 Verify the position of the 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> rods with inoperable RPI indirectly by using core AND power distribution measurement information. Once per 31 EFPD thereafter AND 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after discovery of each unintended rod movement AND 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after each movement of rod with inoperable RPI > 12 steps AND Prior to THERMAL POWER exceeding 50%

RTP AND 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after reaching RTP OR Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.7-2 Unit 2 - Amendment No. 221

Rod Position Indication 3.1.7 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.3 Reduce THERMAL 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> POWER to < 50% RTP.

B. More than one RPI per B.1 Place the control rods under Immediately group inoperable in one manual control.

or more groups.

AND B.2 Monitor and record demand Once per hour position indication for rods with inoperable RPIs.

AND B.3 Verify, using core power Once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> distribution measurement information, position of rods with inoperable RPIs which have been moved in excess of 24 steps in one direction since last determination of their position.

AND B.4 Restore inoperable RPIs to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> OPERABLE status such that a maximum of one RPI per group is inoperable.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.7-3 Unit 2 - Amendment No. 221

Rod Position Indication 3.1.7 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME C. One or more demand C.1.1 Verify by administrative Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> position indicators per means all RPIs for the bank inoperable in one or affected bank(s) are more banks. OPERABLE.

AND C.1.2 Verify the most withdrawn Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> rod and the least withdrawn rod of the affected bank(s) are

< 12 steps apart.

OR C.2 Reduce THERMAL POWER to < 50% RTP. 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> D. Required Action and D.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time not met.

Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.7-4 Unit 2 - Amendment No. 221

Rod Position Indication 3.1.7 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.7.1 -------------------- NOTE-----------------------------------

Not required to be met for RPIs associated with rods that do not meet LCO 3.1.4.

Verify each RPI agrees within 12 steps of the group Once prior to demand position between 30 and 215 steps, or within criticality after 24 steps of the group demand position when the each removal of demand position is > 215 steps or < 30 steps. the reactor head Prairie Island Unit 1 - Amendment No. 233 Units 1 and 2 3.1.7-5 Unit 2 - Amendment No. 221

ATTACHMENT 3 PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 Supplement to Application to Revise Technical Specifications to Adopt TSTF-547, "Clarification of Rod Position Requirements" TECHNICAL SPECIFICATION BASES PAGES (MARKUP)

FOR INFORMATION ONLY Revised LCO 3.1.4 and LCO 3.1.7 Bases replacement pages (3 Pages Follow)

Rod Group Alignment Limits B 3.1.4 BASES LCO calculations using rod drive cabinet counters or Pulse to Analog (continued) counters. Individual rod indication may be provided by either the IRPI control board meters or ERCS.

The requirement to maintain the indicated rod alignment to within plus or minus 12 steps of group demand when the group demand position is between 30 and 215 steps accounts for RPI system inaccuracy of +/-5% (approximately 12 steps) of full rod travel. The minimum actual misalignment assumed in safety analysis is 24 steps (15 inches), and in some cases a total misalignment from fully withdrawn to fully inserted is assumed.

Failure to meet the requirements of this LCO may produce unacceptable power peaking factors and LHRs, or unacceptable SDMs, all of which may constitute initial conditions inconsistent with the safety analysis. of the associated rods This LCO is modified by a Note indicating individual control rod position indications may be outside their limits for up to and including one hour following substantial control rod movement.

This allows up to one hour of thermal soak time to allow the control rod drive shaft to reach thermal equilibrium and thus present a consistent position indication. Substantial rod movement is considered to be 10 or more steps in one direction in less than or equal to one hour.

In accordance with this Note, the comparison of group demand position and RPI may take place at any time up to one hour after rod motion, at any power level. Based on this allowance, rod position may be considered within limits during the thermal soak time to allow position indication to stabilize.

APPLICABILITY The requirements on RCCA OPERABILITY and alignment are applicable in MODES 1 and 2 because these are the only MODES in which neutron (or fission) power is generated, and the Prairie Island Units 1 and 2 B 3.1.4-6 Revision 242

Rod Position Indication B 3.1.7 of the associated rods BASES LCO (continued) This LCO is modified by a Note indicating individual control rod position indications may not be within limits for up to and including one hour following substantial control rod movement. This allows up to one hour of thermal soak time to allow the control rod drive shaft to reach thermal equilibrium and thus present a consistent position indication. Substantial rod movement is considered to be 10 or more steps in one direction in less than or equal to one hour.

In accordance with this Note, this comparison of bank demand position and RPI may take place at any time up to one hour after rod motion, at any power level. Based on this allowance, position indication may be considered OPERABLE during the thermal soak time to allow position indication to stabilize.

APPLICABILITY The requirements on the RPI and step counters are only applicable in MODES 1 and 2 (consistent with LCO 3.1.4, LCO 3.1.5, and LCO 3.1.6), because these are the only MODES in which power is generated, and the OPERABILITY and alignment of rods have the potential to affect the safety of the plant. In the shutdown MODES, the OPERABILITY of the shutdown and control banks has the potential to affect the required SDM, but this effect can be compensated for by an increase in the boron concentration of the Reactor Coolant System. See LCO 3.1.1, SHUTDOWN MARGIN (SDM), for SDM requirements in MODE 2 with keff < 1.0 and MODES 3, 4, and 5 and LCO 3.9.1, Boron Concentration, for boron concentration requirements during MODE 6.

Prairie Island Units 1 and 2 B 3.1.7-5 Revision 242

Rod Position Indication B 3.1.7 BASES SURVEILLANCE SR 3.1.7.1 (continued)

REQUIREMENTS This Surveillance is performed prior to reactor criticality after each removal of the reactor head as there is the potential for unnecessary plant transients if the SR were performed with the reactor at power.

REFERENCES 1. Criteria 12 and 13 of:

Atomic Energy Commission Proposed Rule Making, Part 50 -

Licensing of Production and Utilization Facilities; General Design Criteria for Nuclear Power Plant Construction Permits, Federal Register 32, No. 132 (July 11, 1967): 10213. [NRC Accession Number: ML043310029]

2. USAR, Sections 14.4 and 14.5.

The Surveillance is modified by a Note which states it is not required to be met for RPIs associated with rods that do not meet LCO 3.1.4. If a rod is known to not to be within 12 steps (between 30 and 215 steps) or within 24 steps (when < 30 steps or > 215 steps) of the group demand position, the ACTIONS of LCO 3.1.4 provide the appropriate Actions.

Prairie Island Units 1 and 2 B 3.1.7-10 Revision 242

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