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Category:Legal-Exhibit
MONTHYEARIR 05000271/20120082012-04-20020 April 2012 Official Exhibit - NYS000462-00-BD01 - IR 05000271-12-008; 1/9 - 13, 1/23 - 27, and 3/19 - 20/2012; Vermont Yankee Nuclear Power Station; Post Approval Site Inspection for License Renewal 1P71003. ML15331A1572011-12-23023 December 2011 Official Exhibit - NYS000460-00-BD01 - Commitment Charge Process. IR 05000271/20110112011-12-22022 December 2011 Official Exhibit - NYS000459-00-BD01 - IR 05000271-11-011; 10/17/2011 - 12/11/2011; Vermont Yankee Nuclear Power Station; Review of License Renewal Activities. ML0825303982008-09-14014 September 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-28-VY, VY EPRI Checworks Wear Rate Analysis Results Cycles 20 & 21 (2001) ML0823304162008-08-12012 August 2008 Entergy Exhibit List - Appendix a, Entergy Nuclear Vermont Yankee LLC and Entergy Nuclear Operations Inc. July 2008 Evidentiary Hearing ML0823304172008-08-12012 August 2008 NRC Staff Exhibit List - Vermont Yankee Nuclear Power Station July 2008 Evidentiary Hearing ML0823304192008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing, New England Coalition Exhibit List ML0823304982008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Intervenor Exhibit NEC-JH_35, NRC, Safety Evaluation by the Office of Nuclear Reactor Regulation Related to Amendment No. 229 to Facility Operating License No. DPR-28 Entergy Nuclear Vermont... ML0825303702008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-19-VY, Effects of Chemistry on Corrosion-Erosion of Steels in Water and Wet Steam ML0825303692008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-18-VY, NRC Exhibit NEC-JH_18 LRA A3 Fdw 02 at Lph Ppb ML0825303452008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-08-VY, Flow-Accelerated Corrosion in Power Plants ML0825303102008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-17-VY, INPO Report OE-21421 (Dresden 3) ML0825303092008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-16-VY, INPO Report OE-17654 (Clinton) ML0825303082008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-15-VY, INPO Report OE-20246 (Clinton) ML0825303072008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-15-VY, INPO Report OE-20246 (Clinton) ML0825303062008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-13-UY, INPO Report OE-17412 (Clinton) ML0823406782008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Intervenor Exhibit NEC-RH_02, Curriculum Vitae of Rudolf Hausler ML0825302762008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-06-VY, VY Procedure EN-DC-315 ML0825302732008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-03-VY, Fitzpatrick Cv BVY 04-058, 2008-08/12-Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E3-04-VY Attachment 2 to Supplement 8 to VY EPU Application2008-08-12012 August 2008 2008-08/12-Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E3-04-VY Attachment 2 to Supplement 8 to VY EPU Application BVY 05-084, Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E3-05-VY, Attachment 6 to Supplement 33 to VY EPU Application2008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E3-05-VY, Attachment 6 to Supplement 33 to VY EPU Application ML0825301682008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E3-02-VY, Hoffman Cv ML0825200232008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E2-06-VY, NUREG/CR-6583 ML0823406802008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Intervenor Exhibit NEC-UW_02, Curriculum Vitae of Ulrich Witte ML0823407332008-08-12012 August 2008 Vermont Yankee July 2008 Evidentiary Hearing - Intervenor Exhibit NEC-UW_15, L. 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Subject:
OE18478 - Update to OE 17412 Pipe Damage Found to, Cause High Condenser Air In-leakage Abstract: This is an update to OE17412 Clinton Power Station (CPS) submitted in November 2003. CPS took a down power to 49% reactor power on October 31, 2003 to perform field investigations to locate the source of high main condenser air in-leakage. CPS discovered that the continuous vent lines for both #2 feedwater heaters were leaking.
During ClR09, CPS removed the leaking piping and installed CrMo material replacement piping. CPS evaluated the damaged piping and determined that the cause of the through-wall holes was impingement.
Reason for Message: Communicate final evaluation results for the cause of a large condenser air in-leakage.
Event Date: ............. 10-31-03 Unit Name: ...............Clinton NSSS/A-E: ................ General Electric / Sargent & Lundy Turbine Manufacturer: ... General Electric Maintenance Rule Applicability: No
==
Description:==
The Drains and Vents (DV) system consists of piping that serves as the drainage path for excess heating steam (extraction steam (ES)) and water from the shell side of the FW heaters to either drain tanks or the condenser. Those portions of DV lines that connect to the condenser operate at a vacuum near the condenser. If a DV line experiences a through wall hole near the condenser, air in-leakage to the condenser will occur.
lDV07AA and AB are continuous flow DV lines that connect to the condenser. These lines connect the 2A and 2B FW heaters to the condenser. The piping geometry consists of a straight run of pipe connecting to a 45-degree elbow, then a short run (6-12 inches) of straight pipe connected to a second-45-degree elbow. Finally, a straight run of pipe (1-2 feet) connects the second 45-degree elbow to the condenser nozzle. Each of the welds had a backing ring attached.
Both of these lines had holes located on the extrados of the second 45-degree elbow. These holes allowed air in-leakage to the condenser.
Causes: The degradation mechanism that caused these holes is steam DOCKETED jet impingement. Impingement is a localized mechanical degradation USNRC mechanism and is similar to sandblasting the surface., The small watekgust12,20080(1:Oam) droplets in the steam/moisture mixture impact the surface removing very small amounts of material. Over time, the result is a hole, OFFICE OF SECRETARY RULEMAKINGS AND through the component wall. ADJUDICATIONS STAFF The impingement occurred because of the piping geometry; i.e. the back-to-back 45-degree elbows, and their close proximity to the ..
condenser. The inclusion of the backing rings during construction. ,.
magnified the impingement.
There is also some evidence of flow-accelerated corrosion (FAC),, <-.
however FAC did not cause the holes. FAC is a chemical degradation,
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mechanism. Under the right conditions, i'e. temperature, pH, flow velocity, oxygen content, and moisture content for two-phase flow,' the protective corrosion layer on the interior surface dissolves and washes away. The material then reforms the passive corrosion layer, causing wall thinning. This process continually repeats itself until there is significant wall loss. FAC covers larger sections of a component than impingement.
Corrective-Actions: Action 1, identify the component scope for impingement inspection program. The systems of concern are DV, TD, ES, and HD. -Closure of this assignment includes documentation of the results and providing the results to the FAC Program owner.
Action 2, developand implement inspection program'.using scope from Action 1.
Subject:
0E18478"- Update to OE 17412 Pipe Damage Found to Cause High Condenser Air In-leakage Please note that access to Nuclear Network is restricted, to organizations authorized by INPO. The information exchanged via this network is confidential and for the sole use of the authorized organization. Confidentiality is important to, ensure the open and frank exchange of information among authorized organizations.
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Information Contact:
Paul Manbeck FAC Program Owner 217 937-3429 pmanbeck@cps.amergenenergy.com 191ýRý Dý ýN ý *