Whitey SCHE Gauge and Root Valves Page: 1 of 20
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ENGINEERING CHANGE NOTICE - ------- -
Page 1 of r1J
2. ECN Category (mark one) 3. Originator's Name, Organization, MSIN, and Telephone No. 4. USQ Required? 5. Date
A. Artzer, CVDF, X3-78, 372-2801 [X] Yes  No 9/7/00
Direct Revision 6. Project Title/No./Work Order No. 7. Bldg./Sys./Fa. No. 8. Approval Designator
Change ECN  SNF/W-441, Spent Nuclear Fuel CVDF SNQ
Temporary  Cold Vacuum Drying 142K
Supersedure  9. Document Numbers Changed by this ECN 10. Related ECN No(s). 11. Related PO No.
Cancel/Void  (includes sheet no. and rev.)
SNF-3921, Rev. 5 N/A N/A
12a. Modification Work 12b. Work Package 12c. Modification Work Complete 12d. Restored to Original Condi-
No. tion (Temp. or Standby ECN only)
 Yes (fill out Blk. N/A N/A N/A
[X] No (NA Blks. 12b, Design Authority/Cog. Engineer Design Authority/Cog. Engineer
12c, 12d) Signature & Date Signature & Date
13a. Description of Change
13b. Design Baseline Document?  Yes [X] No
Revised Valve Seat Leakage Acceptance Criteria from <0. I SCC/min N2 @ 4000 psig to <0.1 SCC/min N2 @ 150 psig to match up with
operating conditions and OTE-2131 test procedure.
USQ Approval: C\/ 0 - - 5 A /"17 O
14a. Justification (mark one) 14b. Justification Details
Criteria Change  Seat leakage test is not needed at full design pressure because valves are open during normal operation.
Design Improvement [X]
EnvironyDenta  The design verification method for SC/SS components is by independent review in
Facility Deactivation 11 accordance with EN-6-027-01. Documentation of this review is accomplished by the
As-Found  independent review approval signature provided on page 2 of this ECN.
Facilitate Const [J
Const. Error/Omission 
15. Distribution (include name, MSIN, and no. of copies) RELEASE STAMP
See distribution sheet.
uTA. RELEASE ID:
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Miska, C. R. Whitey SCHE Gauge and Root Valves, report, September 11, 2000; United States. (digital.library.unt.edu/ark:/67531/metadc740738/m1/1/: accessed February 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.