ML051990234
| ML051990234 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 07/12/2005 |
| From: | Richard Ennis Office of Nuclear Reactor Regulation |
| To: | Daflucas R Entergy Nuclear Northeast |
| References | |
| Download: ML051990234 (4) | |
Text
I Rick Ennis - Three new EMEB RAls Page 1 l IRcEnns-TrenwEERAsPg1 From:
Rick Ennis To:
Ronda Daflucas Date:
7/12/05 1:27PM
Subject:
Three new EMEB RAls
- Ronda, Attached are three new draft RAls from Pat Sekerak in EMEB. These questions are items that he determined EMEB needed clarification or additional information on to complete the non-steam dryer portions of their review. Please let me know if you want to set up a conference call.
- thanks, Rick CC:
Brian Hobbs; Brooke Poole; Cheng-lh Wu; Craig Nichols; Darrell Roberts; Gene Imbro; Jim DeVincentis; Kamal Manoly; Len Gucwa; Rebecca Karas; S. Patrick Sekerak; Thomas Scarbrough
I c-XtemD\\GWI00001.TMP Paae 1 1 c:\\temo\\GW O OO.TM Pae I Mail Envelope Properties (42D3FD90.1 B 1: 15: 20516)
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Three new EMEB RAIs 7/12/05 1:27PM Rick Ennis RXE~nrc.gov Recipients owf2po.OWFNDO TGS CC (Thomas Scarbrough) owf4_po.OWFNDO DJR CC (Darrell Roberts)
Action Delivered Delivered Date & Time 07/12/05 01:27PM 07/12/05 01:27PM entergy.com bhobbs CC (Brian Hobbs) cnichol CC (Craig Nichols) jdevinc CC (Jim DeVincentis)
LGUCW90 CC (Len Gucwa) rdafluc (Ronda Daflucas) nrc.gov OWGWPOO2.HQGWDO01 EXI CC (Gene Imbro) nrc.gov owf2_o.OWFNDO CIWI CC (Cheng-Ih Wu)
KAM CC (Kamal Manoly) nrc.gov owf4po.OWFNDO PXSI CC (S. Patrick Sekerak)
RLK CC (Rebecca Karas) nrc.gov owf5_o.OWFN DO BDP CC (Brooke Poole)
Delivered Delivered Delivered Delivered 07/12/05 01:27PM 07/12/05 01:27PM 07/12/05 01:27PM 07/12/05 01:27PM Post Office owf2po.OWFNDO owf4po.OWFNDO Delivered 07/12/05 01:27PM 07/12/05 01:27PM Pending 07/12/05 01:27PM Route entergy.com nrc.gov OWGWPOO2.HQGWDOO0I
I I c:\\temP\\GW100001.TMPX Page 21" I c:tem\\GWIOOO.TM Pae 2 owf2_po.OWFNDO owf4_po.OWFNDO owf5_po.OWFNDO 07/12/05 01:27PM 07/12/05 01:27PM 07/12/05 01:27PM nrc.gov nrc.gov nrc.gov Files MESSAGE psekerak emeb rai.wpd Options Auto Delete:
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Size 833 4046 Date & Time 07/12/05 01:27PM 07/12/05 01:17PM No None Yes Standard No None No Standard Immediate Delivered & Opened
147.
On page 3-4 of Attachment 4 to the application dated September 10, 2003, ASME Code Section Xl, Subsection IWB-3641 is cited as the code requirements governing the stress analysis of the modification of the Core Spray nozzle and safe end. Please discuss the applicability of IWB-3641, which provides procedures for piping flaw evaluation, in lieu of the original Code of construction for analysis of modifications made to this component.
148.
On page 3-20 of Attachment 4 to the application dated September 10, 2003, the section addressing pipe stresses states: "For those systems that do not require a detailed analysis, pipe routing and flexibility was evaluated and determined to be acceptable."
a)
Discuss the method used for evaluating flexibility of piping.
b)
What acceptance criteria are applicable to the flexibility evaluation?
c)
Which piping systems were evaluated with this approach?
149.
On page 3-35, Table 3-3, of Attachment 4 to the application dated September 10, 2003, the primary plus secondary stress level reported for the feedwater nozzle and safe end under CPPU conditions is extremely close to the allowable ASME Code limit. Please discuss the general analytical approach used to calculate this stress. Also, explain the primary reasons for the 21 % increase in stress over the CLTP stress reported, and why the feedwater nozzle CPPU stress and usage factor increases are so much larger than the increases for the other components listed in Table 3-3.