ML090540441
| ML090540441 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 02/09/2009 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| Download: ML090540441 (4) | |
Text
1 PrairieIslandNPEm Resource From:
Richard Plasse Sent:
Monday, February 09, 2009 2:14 PM To:
Eckholt, Gene F.; Vincent, Robert
Subject:
FW: Draft Phone Call List Attachments:
List of topics for discussion in phone call.doc Additional draft followups for telecon 2/10. I will call tomorrow AM, to set up logistics.
Rick From: James Medoff Sent: Monday, February 09, 2009 1:39 PM To: Richard Plasse
Subject:
Draft Phone Call List
Hearing Identifier:
Prairie_Island_NonPublic Email Number:
737 Mail Envelope Properties (Richard.Plasse@nrc.gov20090209141300)
Subject:
FW: Draft Phone Call List Sent Date:
2/9/2009 2:13:45 PM Received Date:
2/9/2009 2:13:00 PM From:
Richard Plasse Created By:
Richard.Plasse@nrc.gov Recipients:
"Eckholt, Gene F." <Gene.Eckholt@xenuclear.com>
Tracking Status: None "Vincent, Robert" <Robert.Vincent@xenuclear.com>
Tracking Status: None Post Office:
Files Size Date & Time MESSAGE 232 2/9/2009 2:13:00 PM List of topics for discussion in phone call.doc 33274 Options Priority:
Standard Return Notification:
No Reply Requested:
No Sensitivity:
Normal Expiration Date:
Recipients Received:
List of topics for discussion in phone call (draft issues for discussion from either previous RAIs or identified as a result of Senior NRC engineer peer review :
- 1. Boric Acid Corrosion Program - Received their amended response. The response to ASME Class 1 components is acceptable. The response to non-safety related components appears to be okay so long as the leakage from these components would not spread onto a safety related component that is susceptible to boric acid corrosion. But for the non-safety components, the applicant has not tied down what they would do if the borated water leakage is occurring from a non-safety related component in the vicinity of a safety related component that is susceptible to boric acid corrosion. Thus, the question remains is it acceptable to defer cleaning up the residues and/or repairing that is occurring from these non-safety components. Also, there has been recent Comanche Peak operating experience that discusses borated water leakage past their sump sandbox covers. The event summarized in NRC web page http://nrr10.nrc.gov/forum/forumtopic.cfm?selectedForum=03&forumId=AllComm&topicId=2172 identifies that the boric acid leakage resulted in a boric acid residues on their reactor coolant pumps and their components supports. The Comanche peak evaluation of their event lists similar experience at Catawba, Sumner, and PINGP (OE26505 - Prairie Island Unit 1 - Event Date 2/20/2008). We ask PINGP if these sump covers have are within the scope of license renewal and an AMR. If not we need to ask PINGP whether they need to consider these components for inclusion under 10 CFR 54.4(a)(2) and an AMR on these components on borated water leakage - given that the guidance in SRP-LR Section A.1.2.1 states that leakage past a bolted connection should not be treated as an abnormal event. (Reviewer - E. Patel)
- 2. AMRs on management of cracking in Class 1 CASS piping components - Basis for crediting UT when current UT methods have not be qualified as being capable of differentiating between UT signals that reflect from cracks/flaws in CASS materials and those that arise from the complexity of having a large grained CASS microstructure.
- 3. Inspection of Internal Surfaces in Miscellaneous Piping and Ducting Components Program -
The GALL AMP XI.M38 program states that the inspections are to be done on a periodic basis.
Their basis credits inspections only when they schedule components for surveillance or maintenance. This does not ensure the components will ever be looked at and is not in conformance with the detection of aging effects program element recommendation in the GALL AMP. This is going to be an issue with us. The inspections need to be on a justified periodic basis. (Reviewer - On Yee)
- 4. AMR for managing loss of material due to pitting and crevice corrosion in SG shell-to-transition cone welds - They state that they have augmented their ISI program to address the issues raised in Information Notice 90-04, but we need additional details on what they did resolve the UT signal issue raised in the IN (i.e., the capability of distinguishing between UT signals deriving from pitts or cracks in the component from those the derive (reflect) as a result of the complexity in the weld geometry. They may be able to clear this up in a phone call.
Draft Open Items At this Point:
- 1. Fuel Oil Analysis Program - Many issues to discuss. They take an exception on biocide and corrosion additives in that they are not using. They also take an exception on not doing any monitoring for biological corrosion. For many of their tanks, they also take an exemption that they will not drain the tanks. These exceptions interrelate in that they are not crediting any examinations or testing for biological activity in the fuel oil. Also they are using ASTM Standard D975 in lieu of many of the standards stated in the GALL AMP but did not identify this as an exception. (Reviewer - W. Pavinich)
- 2. New exception to Closed Cycle Cooling Water Program - only doing water quality testing of specific room chillers (i.e,. not crediting visuals or performance testing of these chillers).
Justification for doing water chemistry alone, without either confirmatory visual examination of internal surfaces or performance testing. (W. Jackson)
Basis for crediting Water Chemistry Program and One-time Inspection to manage cracking due to SCC is acceptable. However, basis for crediting TLAA on metal fatigue to manage cracking due to cyclical loading on non-regenerative heat exchangers is unacceptable, particularly when these heat exchanger components have been exempting from receiving any TLAA fatigue analyses.