ML092160429

Request for Additional Information (Rais) License Amendment Request for One-time Extension of Allowable Outage Time in TS 3.8.1, LCO Action A3, from 72 Hours to 10 Days for Replacement of Transformer ST-20

ML092160429
Person / Time
Site:	Susquehanna
Issue date:	07/20/2009
From:	Bhalchandra Vaidya Plant Licensing Branch 1
To:	Coddington C, Filchner D, Hoffman C, O'Rourke B Susquehanna
vaidya B, NRR/Dorl/lpl1-1, 415-3308
References
TAC ME0969, TAC ME0970
Download: ML092160429 (3)

Text

From: Vaidya, Bhalchandra Sent: Monday, July 20, 2009 2:04 PM To: 'dlfilchner@pplweb.com'; 'Coddington, Cornelius T';

'ckhoffman@pplweb.com'; 'O'Rourke, Brenda W' Cc: Salgado, Nancy; Boska, John; Wilson, George; Miller, Kenn; Waig, Gerald; Marrero, Abraham; Elliott, Robert; Schulten, Carl

Subject:

Susq Units 1 & 2, TAC Nos. ME0969 & ME0970- Draft Follow-up RAIs from Electrical Engineering Branch (EEEB)

SUBJECT:

PPL Susquehanna, Units 1 and 2. - REQUEST FOR ADDITIONAL INFORMATION (RAIs) RE:

License Amendment Request for One-time extension of Allowable Outage Time in TS 3.8.1, LCO ACTION A3, from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 10 days for replacement of Transformer ST-20 (TAC NOS. ME0969 and ME0970)

By letter dated March 24, 2009, supplemented by letters dated April 30 and May 12, you submitted a license amendment request for One-time extension of Allowable Outage Time in TS 3.8.1, LCO ACTION A3, from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 10 days for replacement of Transformer ST-20. You responded to Technical Specification Branch (ITSB) RAIs by letter dated June 29, 2009.

Based in its review of your responses, the ITSB needs additional information to complete its review of the license amendment request mentioned above. The Draft Follow-up RAIs are provided below:

===============================

Draft Follow-up Request for Additional Information:

PPL Susquehanna meets GDC 17 requirements in its design by providing two physically independent circuits from the offsite transmission network providing redundancy and defense in depth methodology to the offsite circuit system. Thus the Offsite circuits are redundant in relation to each other.

Rendering ST-20 inoperable at PPL Susquehanna in its current design would require entry into LCO 3.8.1 for one offsite circuit inoperable. TS LCO 3.8.1 allows SSES not to comply with single failure criteria for a limited period of time. TS Bases for 3.8.1 state The remaining OPERABLE offsite circuit and DGs are adequate to supply electrical power to the onsite Class 1E Distribution System. Thus, on a component basis, single failure protection may have been lost for the required features function; however, function is not lost. Thus removal of ST-20 from service degrades the redundancy of the offsite distribution system and qualifies ST-20 as a redundant component.

1. Based on the above, explain why intentional removal of one offsite circuit from service at SSES does not render a redundant component inoperable as stated in RAI responses sent to NRC staff dated June 29th, 2009.

2. Also Based on the statement above, clarify your response from NRC ITSB QUESTION 2 stating that the LCO 3.0.2 Bases statement "Intentional entry into ACTIONS should not be made for operational convenience." does not apply to SSES.

===========================

Please let me know ASAP, the convenient time for a phone call discussion for the clarification of the NRC staff concerns and requirements.

Bhalchandra K. Vaidya

Licensing Project Manager NRC/NRR/DORL/LPL1-1 (301)-415-3308 (O) bhalchandra.vaidya@nrc.gov E-mail Properties Mail Envelope Properties ()

Subject:

Susq Units 1 & 2, TAC Nos. ME0969 & ME0970- Draft Follow-up RAIs from Electrical Engineering Branch (EEEB)

Sent Date: 07/20/2009 1:51:59 PM Received Date: 07/20/2009 2:03:00 PM From: Vaidya, Bhalchandra Created By: Bhalchandra.Vaidya@nrc.gov Recipients:

dlfilchner@pplweb.com ('dlfilchner@pplweb.com')

Tracking Status: None ctcoddington@pplweb.com ('Coddington, Cornelius T')

Tracking Status: None ckhoffman@pplweb.com ('ckhoffman@pplweb.com')

Tracking Status: None BWORourke@pplweb.com ('O'Rourke, Brenda W')

Tracking Status: None Nancy.Salgado@nrc.gov (Salgado, Nancy)

Tracking Status: None John.Boska@nrc.gov (Boska, John)

Tracking Status: None George.Wilson@nrc.gov (Wilson, George)

Tracking Status: None Kenneth.Miller2@nrc.gov (Miller, Kenn)

Tracking Status: None Gerald.Waig@nrc.gov (Waig, Gerald)

Tracking Status: None Abraham.Marrero@nrc.gov (Marrero, Abraham)

Tracking Status: None Robert.Elliott@nrc.gov (Elliott, Robert)

Tracking Status: None Carl.Schulten@nrc.gov (Schulten, Carl)

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 22068 07/20/2009 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: