L-MT-12-090, Westinghouse, LTR-A&SA-12-8, Rev. 1, Attachment B, Recommendations for Inspections of the Monticello Replacement Steam Dryer.

Westinghouse, LTR-A&SA-12-8, Rev. 1, Attachment B, Recommendations for Inspections of the Monticello Replacement Steam Dryer.

ML12298A033
Person / Time
Site:	05000283
Issue date:	09/30/2012
From:	Westinghouse
To:	Office of Nuclear Reactor Regulation
References
L-MT-12-090, TAC MD9990 LTR-A&SA-12-8, Rev 1
Download: ML12298A033 (15)

Text

L-MT-12-090 ENCLOSURE 3 WESTINGHOUSE LETTER, LTR-A&SA-12-8, REVISION 1, ATTACHMENT B WESTINGHOUSE RECOMMENDATIONS FOR INSPECTIONS OF THE MONTICELLO REPLACEMENT STEAM DRYER 14 pages follow

WESTINGHOUSE NON-PROPRIETARY CLASS 3 Attachment B to LTR-A&SA-12-8 Revision 1 Non-Proprietary Class 3 Westinghouse Recommendations for Inspections of the Monticello Replacement Steam Dryer September 2012 Westinghouse Electric Company LLC 1000 Westinghouse Drive Cranberry Township, PA 16066 USA

© 2012 Westinghouse Electric Company LLC All Rights Reserved

WESTINGHOUSE NON-PROPRIETARY CLASS 3 Westinghouse Recommendations for the Inspections of the Monticello Replacement Steam Dryer 1.0 INSPECTION PROGRAM OVERVIEW Northern States Power, Minnesota (NSPM) installed the Westinghouse replacement steam dryer (RSD) into the Monticello plant in May 2011. The purpose of this document is to provide the Westinghouse recommendations as related to the inspections of the new steam dryer. The first inspection of this new steam dryer is planned to occur in the Spring 2013. Since during this first operating cycle with the new steam dryer, the Monticello plant did not exceed CLTP operating conditions, the inspection recommendations are reduced. The present plan is for Monticello to perform a power ascension to EPU conditions following the Spring 2013 outage. As a result, this document also provides the Westinghouse recommendations for the inspections of the new steam dryer following the first cycle of operation at EPU conditions, presently scheduled for Spring 2015.

The steam dryer inspection plan will consist of visual inspections and be primarily based on the following:

a,c

ac 2.0 TYPE OF INSPECTION 2.1 Inspection that will occur in Spring 2013 ac 2.2 Inspection that will occur after the first operating cycle at EPU conditions (2015) ac 3.0 INSPECTION FREQUENCY ac 2

4.0 INSPECTION LOCATIONS - SPRING 2013 7 a,c 3

6.0 INSPECTION LOCATIONS - AFTER ONE CYCLE AT EPU CONDITIONS (2015) 7 a,c

ac 5

a,c 6

ac

6.0 REFERENCES

1) BWRVIP-139-A: "BWR Vessel and Internals Project, Steam Dryer Inspection and Flaw Evaluation Guidelines", EPRI 1018794, Final Report, July 2009

2) BWRVIP-18 1-A: "BWR Vessel and Internals Project, Steam Dryer Repair Design Criteria",

EPRI 1020997, Final Report, July 2010

3) ASME Boiler and Pressure Vessel Code, 2004 Edition,Section XI 7

ac Figure I Dryer Outer Hood Weld Lines (Colored Red) a,c Figure 2 Dryer Middle and Inner Hood Welds (Lines Colored Red) 8

a,c Figure 3 Middle and Inner Hood Stiffener Welds (Lines Colored Red) ac Figure 4 Dryer Support Ring and the Cover Plate Weld (Colored Red) 9

ac Figure 5 Dryer Lifting Rod Welds for Inspection (Lines Colored Red) a~c Figure 6 Dryer Lifting Rod Welds with the Lifting Eye for Inspection (Lines Colored Red) 10

ac Figure 7 Dryer Vane Bank Welds (visible from top) for Inspection (Lines Colored Red and Blue) ac Figure 8 Dryer Vane Bank Welds (visible from underneath the dryer) for Inspection (Lines Colored Red)

II

ac Figure 9 Dryer Skirt and Channel Welds (Lines Colored Red) a,c Figure 10 Dryer Upper Girder Welds (Lines Colored Red) 12

a, c Figure 11 Lower Girder Welds (Lines Colored Red) 13