PLA-7243, Withdrawal of Proposed Amendments for Diesel Generator Testing Use of Increased Minimum Steady State Voltage and New Frequency Tolerance

Withdrawal of Proposed Amendments for Diesel Generator Testing Use of Increased Minimum Steady State Voltage and New Frequency Tolerance

ML15022A013
Person / Time
Site:	Susquehanna
Issue date:	12/22/2014
From:	Franke J Susquehanna
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
PLA-7243, TAC ME9607, TAC ME9608, TAC ME9609, TAC ME9610
Download: ML15022A013 (3)

Text

iI' Jon A. Franke PPL Susquehanna, LLC Site Vice President 769 Salem Boulevard Berwick, PA 18603 Tel. 570.542.2904 Fax 570.542.1504 jfranke@pplweb.com 1I PP TM U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 - 201 4 SUSQUEHANNA STEAM ELECTRIC STATION WITHDRAWAL OF PROPOSED AMENDMENTS FOR DIESEL GENERATOR TESTING USE OF INCREASED MINIMUM STEADY STATE VOLTAGE AND NEW FREQUENCY TOLERANCE (TAC NOS. ME9607 THRU ME9610) Docket No. 50-387 PLA-7243 and No. 50-388

References:

1. PPLLetter (PLA-6825), "Change to Technical Specification Surveillance Requirements (SR) 3.8.1.9, 3.8.1.11, 3.8.1.12, and 3.8.1.19 to Increase Diesel GeneratorMinimum Steady State Voltage," dated September 18, 2012 (Accession ML12262A322).

2. PPL Letter (PLA-6809), "Change to Technical Specification SurveillanceRequirement (SR) 3.8.1.19 to Increase Diesel GeneratorE Minimum Steady State Frequency,"

dated September 18, 2012 (Accession ML12262A321).

3. NRC Letter, "Requestfor Additional Information Regarding Request for Changes to Technical Specification Surveillance Requirements to Increase Diesel Generator Minimum Steady State Voltage (TAC Nos. ME9607 and ME9608),"

dated March 7, 2014 (Accession ML13298A758).

4. NRC Letter, "Requestfor Additional Information Regarding Requestfor Changes to Technical Specification Surveillance Requirement 3.8.1.19 to IncreaseDiesel GeneratorE Minimum Steady State Frequency (TA C Nos. ME9609 and ME9610),"

dated March 7, 2014 (Accession ML13298A781).

5. PPLLetter (PLA-6997), "Response to Request for AdditionalInformation Regarding Changes to Technical Specification (TS) Surveillance Requirements (SR) to Increase Diesel GeneratorMinimum Steady State Voltage," dated May 10, 2013 (Accession ML13130A130).

6. PPL Letter (PLA-6998), "Response to Requestfor Additional Information Regarding Changes to Technical Specification (TS) Surveillance Requirement (SR) 3.8.1.19 to Increase Diesel GeneratorE Minimum Stead)' State Frequency, " dated May 10, 2013 (Accession ML131130A12 7). A1 oL5J 0 0,-

Document Control Desk PLA-7243 PPL Susquehanna, LLC (PPL) hereby withdraws, in their entirety, proposed amendments in References 1 and 2. The decision to withdraw is related to plans for new design analysis that will impact the original proposals. PPL submitted the proposed amendments to the Susquehanna Station Electric Station (SSES) Units 1 and 2 Technical Specification (TS) for several Surveillance Requirements (SRs) for diesel generator (DG) testing.

Reference 1 was intended to raise the DG minimum steady state voltage in TS to establish new acceptance criteria above a Degraded Voltage Relay (DVR), reset nominal

.setting. This new acceptance criteria is already in use and was previously implemented with a calculation change to show required components would load onto the ESS bus during an emergency.

Reference 2 was intended to raise the lower side of the nominal steady state frequency band for the 'E' DG. This change would simplify the analysis of a postulated transient frequency dip during operation of the 'E' DG.

In References 3 and 4, the NRC requested additional information (RAI) with responses due by December 31, 2014. Previously, PPL responded to RAI questions on both requests, in two submittals dated May 10, 2013, (References 5 and 6).

On November 6, 2014, PPL discussed with the NRC Project Manager that new design analysis currently in development expands the scope of the original licensing action requests in References 1 and 2. Implementing the new design analysis will substantially modify the original proposals, in addition to addressing the NRC's RAI. However, additional time to implement the new design analysis would be required.

Following additional discussion with the NRC Project Manager, a decision was reached to request withdrawal of the separate licensing action requests. Withdrawal of these proposals (which affect the same SRs for the DGs) at this time allows the implementation of additional scope identified during development of the new design analysis. Therefore, when the completed new design analysis includes this new scope, a single licensing action request to obtain NRC review and approval will be submitted. PPL plans to request a pre-submittal meeting with the NRC before making the new request.

The new design analysis supports the needed design controls for use of more restrictive new surveillance test acceptance criteria than in existing TS. The activities that are related to this effort remain conservatively implemented at the station, and are addressed by the Station's Corrective Action Program.

Document Control Desk PLA-7243 There are no new regulatory. commitments associated with this response.

If you have any questions or require additional information, please contact Mr. Duane L. Filchner (570) 542-6501.

Sincerely, J.ýA. anakeý opy: NRC Region I Mr. J. Greives, NRC Sr. Resident Inspector Mr. L. Winker, PA DEP/BRP