L-PI-22-024, Supplement to Application for License Amendment to Implement 24-Month Operating Cycle
| ML22066B341 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 03/07/2022 |
| From: | Domingos C Northern States Power Co, Xcel Energy |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-PI-22-024 | |
| Download: ML22066B341 (6) | |
Text
1717 Wakonade Drive Welch, MN 55089 March 7, 2022 L-PI-22-024 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 for License Amendment to Implement 24-Month Operating Cycle
References:
- 1) Letter L-PI-21-016, Application for License Amendment to Implement 24-Month Operating Cycle, dated August 6, 2021
- 2) Letter L-PI-21-047, Response to Request for Additional Information RE: 24-Month Operating Cycle Amendment Prairie Island Nuclear Generating Plant, Units 1 and 2, dated December 7, 2021 In Reference 1, Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (hereafter NSPM), submitted a license amendment request (LAR) proposing changes to the Prairie Island Nuclear Generating Plant (PINGP) license basis to implement a 24-month operating cycle for PINGP Units 1 and 2 and corresponding changes to the PINGP Technical Specifications (TS). In Reference 2, NSPM enclosed NSPM calculation SPC-AF-EA-RC-RP-001 in response to NRC request for additional information (RAI).
The enclosure to this letter supplements the calculation provided by Reference 2 with a Glossary of Terms.
The information provided with this letter does not alter the evaluations performed in accordance with 10 CFR 50.92 in Reference 1. In accordance with 10 CFR 50.91 (b)(1), a copy of this application, with the enclosure, is being provided to the designated Minnesota Official.
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.
Document Control Desk Page 2 I declare under pena ty of perjury, that the foregoing is true and correct.
~ed on tpz.:L.
~~r P. Domingos "'1h-----
Site Vice President, Montice o and Prairie Island Nuclear Generating Plants Northern States Power Company - Minnesota Enclosure cc:
Administrator, Region Ill, USNRC Project Manager, Prairie Island, USNRC Resident Inspector, Prairie Island, USNRC State of Minnesota
ENCLOSURE PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 Supplement to License Amendment Request Application for License Amendment to Implement 24-Month Operating Cycle GLOSSARY OF TERMS FOR CALCULATION NO. SPC-AF-EA-RC-RP-001 (3 Pages Follow)
SPCAFEARCRP001,Rev.0 Glossary
Page1of3 General Notes
- 1. Equations for the derivation and use of all terms are included in the individual attachments and are not replicated below.
- 2. Minor differences in presentation of terms may exist from attachment to attachment but within each attachment the usage is consistent.
Term Description A
Sum of accuracies for all loop devices AFT As-Found Tolerance AL Analytical Limit AFAL As-Found / As-Left ATSP Actual Plant Trip Setpoint APS Actual Plant Setting AV Allowable Value Bias Algebraic sum of the positive (subscript pos) and negative (subscript neg) non-random components of error.
CI Calibration Interval CS Calibrated Span DA_Ext_Bias Bias portion of the analyzed drift extrapolated to 30 months based on as-found/as-left data.
DA_Ext_Rand Random portion of the analyzed drift extrapolated to 30 months based on as-found/as-left data.
D Sum of the drift for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
DT Drift Time from vendors drift specification (e.g., time dependent error).
H Sum of humidity effects for all loop devices.
SPCAFEARCRP001,Rev.0 Glossary
Page2of3 Term Description LD Loop Drift is the algebraic sum of the random components of drift and positive or negative bias components of drift.
M M&TE Sum of M&TE effects (calibration errors) for all loop devices.
NTSP Nominal Trip Setpoint OM Operating Margin OPE Sum of over pressure effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
P Sum of power supply effects for all loop devices.
PC Process Considerations. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
PEA Primary Element Accuracy. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
PL Process Limit is the non-safety related equivalent of Analytical Limit.
PMA Process Measurement Accuracy. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
PS Process Span R
Sum of radiation effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
READ The square of the indicator readability term.
S Sum of seismic effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
SPCAFEARCRP001,Rev.0 Glossary
Page3of3 Term Description SPES Sum of static pressure span effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
SPEZ Sum of static pressure zero effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
T Sum of temperature effects for all loop devices. Random components are denoted with the subscript R and bias components are denoted with the subscript Bp or Bn.
TLE Total Loop Error