ML12026A460
| ML12026A460 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 01/25/2012 |
| From: | Jason Paige Plant Licensing Branch II |
| To: | Hale S Florida Power & Light Co |
| References | |
| Download: ML12026A460 (3) | |
Text
1 NRR-PMDAPEm Resource From:
Paige, Jason Sent:
Wednesday, January 25, 2012 3:04 PM To:
Hale, Steve Cc:
Abbott, Liz; Tiemann, Philip
Subject:
Turkey Point EPU - Instrumentation and Controls (EICB) Request for Additional Information
- Steve, Below are requests for additional information (RAIs) regarding the Turkey Point extended power uprate (EPU) license amendment request. On January 25, 2012, the Nuclear Regulatory Commission (NRC) staff and Florida Power & Light Company (FPL) discussed draft RAIs to gain a common understanding of the questions.
By letter dated January 19, 2012, FPL responded to question 2 but during the January 25, 2012, call, it was determined that supplemental information is needed. The below RAIs reflect the questions that were sent to you and agreed upon by FPL. FPL agreed upon providing its response within 30 days of the date of this email. If you have any questions, feel free to contact me.
- 1. WCAP-17070-P, Rev. 1 (ML1174A168) submitted by Florida Power & Light Company (FPL) provided the Westinghouse Setpoint Methodology for Protection Systems Turkey Point Units 3 & 4 (Power Uprate to 2644 MWt - Core Power). Tables 3-1 through Table 3-11 (pages 19 to 44) of WCAP-17070-P, Rev. 1, lists uncertainty allowances for the parameters of the revised setpoints. Many of the uncertainty allowances have values of zero with little or no explanations. A few notes have been provided for some of the uncertainty allowances that are zero. Section 3.2 Definitions for Protection System Setpoint Tolerances of WCAP-17070-P defines Normalization to be a process for establishing a relationship between a process parameter and an instrument channel involving an indirect measurement. An example is provided for this definition which describes the process of determining steam mass flow by conducting a mass balance for feed water flow and steam flow using the relationships of the known feed water venturi differential pressure, feed water temperature and pressure parameters for feed water flow, and the assumption that the pounds mass of steam flow must be the same as the feed water mass flow assuming no losses. However, the notes for some other reactor protection channel parameter uncertainties uses the term normalized without providing further explanation as to how this normalization process is accomplished. The NRC staff requests the licensee to provide an explanation justifying any reductions in magnitude or new ways of applying uncertainty allowance values that are included within the determination of Channel Statistical Allowance (CSA) and include a detailed explanation as to how the effects of those uncertainties have been accounted for, and provide detailed explanations and justifications for all uncertainty allowances listed with a value of zero.
- 2. For the proposed limiting safety system setting setpoint changes with TSTF-493 Option A, the licensee commits to apply the two Technical Specification table footnotes applicable to performance monitoring.
Adherence to TSTF-493 requires that the licensee maintain a corrective action program (CAP) when the setpoints are found outside the allowable limits. The licensees are expected to have administrative controls or a corrective action program in place for other reactor protection system (RPS) and engineered safety feature actuation system (ESFAS) setpoints (Setpoints that are not covered by TSTF-493, Option A) to track instrument performance in support of 10 CFR 50.36(c)(1)(ii)(A). Staff expects that the licensee is maintaining the TSTF-493, Option A CAP as well as the original performance monitoring program for all other RPS and ESFAS setpoints. Please confirm that FPL is maintaining these programs.
Jason Paige, Turkey Point Project Manager Plant Licensing Branch II-2
2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation US Nuclear Regulatory Commission Phone: (301) 415-5888
Hearing Identifier:
NRR_PMDA Email Number:
246 Mail Envelope Properties (Jason.Paige@nrc.gov20120125150400)
Subject:
Turkey Point EPU - Instrumentation and Controls (EICB) Request for Additional Information Sent Date:
1/25/2012 3:04:16 PM Received Date:
1/25/2012 3:04:00 PM From:
Paige, Jason Created By:
Jason.Paige@nrc.gov Recipients:
"Abbott, Liz" <Liz.Abbott@fpl.com>
Tracking Status: None "Tiemann, Philip" <Philip.Tiemann@fpl.com>
Tracking Status: None "Hale, Steve" <Steve.Hale@fpl.com>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 3773 1/25/2012 3:04:00 PM Options Priority:
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