ML12104A340
| ML12104A340 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 03/20/2012 |
| From: | Office of Nuclear Reactor Regulation |
| To: | Division of Operating Reactor Licensing |
| References | |
| Download: ML12104A340 (4) | |
Text
1 WBN2NonPublic Resource From:
Poole, Justin Sent:
Tuesday, March 20, 2012 10:33 AM To:
garent@tva.gov Cc:
Bryan, Robert H Jr; WBN2HearingFile Resource
Subject:
DRAFT Request for Additional Information on Open Items 80 and 81 Attachments:
DRAFT Request for Additional Information on Open Item 80 and 81 - EICB - March 2012.docx In reviewing TVAs recent submittals related to Instrumentation and Control Open Items for WBN 2, the staff has come up with the attached questions. Please review to ensure that the RAI questions are understandable, the regulatory basis is clear, there is no proprietary information contained in the RAI, and to determine if the information was previously docketed. If further clarification is needed, and you would like to discuss the questions in a conference call, let us know. Please also let me know how much time Tennessee Valley Authority (TVA) needs to respond to the RAI questions. This email does not convey a formal NRC staff position, and it does not formally request for additional information.
Justin C. Poole Sr. Project Manager NRR/DORL/LPWB U.S. Nuclear Regulatory Commission (301)415-2048 email: Justin.Poole@nrc.gov
Hearing Identifier:
Watts_Bar_2_Operating_LA_Non_Public Email Number:
313 Mail Envelope Properties (19D990B45D535548840D1118C451C74DD8333EBEEE)
Subject:
DRAFT Request for Additional Information on Open Items 80 and 81 Sent Date:
3/20/2012 10:32:39 AM Received Date:
3/20/2012 10:32:41 AM From:
Poole, Justin Created By:
Justin.Poole@nrc.gov Recipients:
"Bryan, Robert H Jr" <rhbryan@tva.gov>
Tracking Status: None "WBN2HearingFile Resource" <WBN2HearingFile.Resource@nrc.gov>
Tracking Status: None "garent@tva.gov" <garent@tva.gov>
Tracking Status: None Post Office:
HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 878 3/20/2012 10:32:41 AM DRAFT Request for Additional Information on Open Item 80 and 81 - EICB - March 2012.docx 27533 Options Priority:
Standard Return Notification:
No Reply Requested:
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Normal Expiration Date:
Recipients Received:
OPEN ITEM No. 80, AND 81 REQUEST FOR ADDITIONAL INFORMATION INSTRUMENTATION AND CONTROL SSER 23, APPENDIX HH, WATTS BAR NUCLEAR PLANT, UNIT 2 (TAC ME2731)
Previous Request for Information on Open Item 80 (Item a):
Tennessee Valley Authority (TVA) tests used a frequency range of 30 Hz to 50 kHz for low frequency conducted susceptibility test instead of the required frequency range of 30 Hz to 150 kHz. In letter dated September 30, 2011 (ML11287A254), under Item Number 8, TVA stated that the TUV tests were conducted with test frequencies from 30 Hz to 150 kHz. Staff has noted that the TUV tests were conducted on the older model of RM-1000 processors and not the models for which credit is taken. TVA is requested to provide its justification for using the TUV tests for the new RM-1000 processors.
TVA Responded with the following:
Justification for using the TÜV test report (GA-ESI document 04038800, RM-1000 EMC Test Report TVA, dated November 11, 1999) is provided in GA-ESI document 04038800-1SP, RM-1000 EMC Test Report Supplement 1, Revision A. GA-ESI document 04038800-1SP, RM-1000 EMC Test Report Supplement 1, Revision A was submitted in TVA to NRC letter dated October 13, 2011 (Reference 1)(ML291A095).
Request for Additional Information:
NRC Staff has reviewed this GA-ESI document 04038800-1SP and 04508905-2SP (referenced in 04038800-1SP and submitted via ML110620236) documents. These documents explain the similarities and differences in the old I-F converter and the new I-F converter model (GA-ESI P/N 04501351-003). It also explains some of the improvements related to shielding for better EMC protection. However, there is no test data or analysis provided to support the missing frequency range (i.e. 50 kHz to 150 kHz). In the NRC letter to TVA dated September 21, 2011 (ML112590046) NRC staff explained that both the Regulatory Guide 1.180, Rev. 1 and MIL Std 461-E require the test range from 30 Hz to 150 kHz for low frequency susceptibility test.
Therefore, TVA is requested to provide test data for closing this item. If majority of the components have already been tested under some other similar tests for the required frequency range, then an analysis with justification for the differences may be provided as an alternate.
Open Item 81:
TVA provided the non-proprietary GA-ESI letter 010-01038-001 as attachment 10 to the December 22, 2011 letter (ML12018A213). This letter states that, The AC Filter is subjected to functional testing by the vendor. GA-ESI documentation indicates the testing was verified during a previous GA-ESI vendor audit. Recent follow up conversations with the vendor indicate the functional test is performed using an automated testing machine, and the results are Pass/Fail.
A test report is not produced during the test, rather, the Certificate of Conformance is provided to certify successful completion of the testing. Attached is a documentation package for a different component, a power supply, which is tested by GA-ESI during receipt inspection.
Request for Additional Information:
TVA to provide the particulars of the test machine for staff to confirm the statement that the test machine is indeed a pass/fail machine prior to accepting the alternate package for acceptable commercial dedication as a sample.