ML15147A038
| ML15147A038 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 05/27/2015 |
| From: | Joel Wiebe Plant Licensing Branch III |
| To: | Krejcie J Exelon Corp |
| References | |
| Download: ML15147A038 (2) | |
Text
1 NRR-PMDAPEm Resource From:
Wiebe, Joel Sent:
Wednesday, May 27, 2015 7:57 AM To:
Jessica Krejcie
Subject:
Preliminary RAIs for Braidwood/Byron License Amendment Request for Diesel Generator Load Rejection Surveillance Requirement The purpose of preliminary RAIs are to ensure the questions are clear and understandable. Let me know by June 3, 2015, if you need a clarification call.
In reviewing Exelon Generation Companys (Exelons) submittal dated December 18, 2014 (ADAMS Accession No. ML15132A351), related to the diesel generator (DG) surveillance requirement, for the Braidwood Station (Braidwood), Units 1 and 2 and Byron Station (Byron), Unit Nos. 1 and 2, the NRC staff has determined that the following information is needed in order to complete its review:
- 1. On Page 7 of Attachment 1 of the license amendment request, the licensee provided Table 1 containing the Byron Station and Braidwood Station Maximum Diesel Generator (DG) Voltages during DG Full Load Reject Testing. The maximum DG voltage is expected to depend upon pre-load-reject DG voltage, kilowatt (kW), and power factor values. To allow the NRC staff to evaluate these voltages, provide the pre-load-reject DG voltage, kW, and power factor values corresponding to each of the Maximum DG Voltage provided in Table 1.
- 2. The potential transformers connected to each DG output will also be subjected to the maximum DG voltage. To allow the NRC staff to evaluate the capability of the potential transformers, provide the maximum test voltages to which these potential transformers have been tested and qualified by the vendor.
- 3. To allow the NRC staff to evaluate the capability of the recording/indicating instrument to indicate the DG voltage, discuss how Exelon selects the acceptable range of the instrument. For a typical performance of the surveillance, provide the maximum range of voltage recording/indicating instrument used
Hearing Identifier:
NRR_PMDA Email Number:
2107 Mail Envelope Properties (Joel.Wiebe@nrc.gov20150527075600)
Subject:
Preliminary RAIs for Braidwood/Byron License Amendment Request for Diesel Generator Load Rejection Surveillance Requirement Sent Date:
5/27/2015 7:56:37 AM Received Date:
5/27/2015 7:56:00 AM From:
Wiebe, Joel Created By:
Joel.Wiebe@nrc.gov Recipients:
"Jessica Krejcie" <Jessica.Krejcie@exeloncorp.com>
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Files Size Date & Time MESSAGE 1725 5/27/2015 7:56:00 AM Options Priority:
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