ML19280A002

NRR E-mail Capture - FitzPatrick Emergency Amendment Public Conference Call Discussion Points - 3

ML19280A002
Person / Time
Site:	FitzPatrick
Issue date:	10/03/2019
From:	Samson Lee NRC/NRR/DORL/LPL1
To:	Williams C Exelon Generation Co
References
Download: ML19280A002 (2)

Text

NRR-DRMAPEm Resource From: Lee, Samson Sent: Thursday, October 3, 2019 3:58 PM To: Williams, Christian D:(Exelon Nuclear)

Subject:

FitzPatrick Emergency amendment public conference call discussion points - 3 On-Load Tap Changer In the draft LAR dated October 2, 2019, Attachment 1, Section 2.0, the following is stated: Loss or degradation of normal AC power at the 4 KV level results in an automatic fast transfer or automatic residual transfer to the offsite AC power sources through the RSSTs 71T-2 and 71T-3. These transformers contain an On-Load Tap Changer to maintain the 4KV Bus voltages under various analyzed scenarios.

The licensee stated today in case the existing RSST 71T-3 cannot be repaired, the alternative will be to replace RSST 71T-3 with an old spare transformer. Does the old spare transformer has an On-Load Tap Changer? If not, will it impact the degraded voltage setpoints specified in JAFNPP TS Table 3.3.8.1-1.

Thanks, Sam 1

Hearing Identifier: NRR_DRMA Email Number: 240 Mail Envelope Properties (BL0PR0901MB3185597138AF01AEA40CC7E99A9F0)

Subject:

FitzPatrick Emergency amendment public conference call discussion points - 3 Sent Date: 10/3/2019 3:57:50 PM Received Date: 10/3/2019 3:57:00 PM From: Lee, Samson Created By: Samson.Lee@nrc.gov Recipients:

"Williams, Christian D:(Exelon Nuclear)" <Christian.Williams@exeloncorp.com>

Tracking Status: None Post Office: BL0PR0901MB3185.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 757 10/3/2019 3:57:00 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: