ML13165A022
| ML13165A022 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/17/2013 |
| From: | Nava R Crane Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML13165A022 (1) | |
Text
CRAN E NUCLEAR a
TELEPHONE (630) 226-4900 FAX (630) 226-4646 CRANE NUCLEAR, INC.
860 REMINGTON BLVD.
BOLINGBROOK, IL 60440 May 17, 2013 US Nuclear Regulatory Commission Washington, DC 20555-0001 Attention:
Subject:
Document Control Desk I0CFR2I Notification on Potential Valve Body Leakage-2" Valve Assembly
Dear Sir or Madam:
This is notification that Crane Nuclear, Inc. has been advised by our customer about leakage on'the body of an installed 2" valve assembly. The 2" valve body identified as leaking or weeping was cast from alloy SB 148 UNS 95200. Crane Nuclear has not corroborated the potential leakage and our customer has returned two valve assemblies for our evaluation.
To date the potential leaking has been isolated to a body on a 2" valve assembly. Crane Nuclear has determined through investigation that this unique alloy cast material has been provided to only one customer, Dominion /
Millstone, over two purchase orders as noted below.
DOMINION PO NUMBER 45864562 45896086' 45896086 45896086 45896086-VALVE VALVE OTY.
4 3
1 3"
39557-01 3/4" 40224-01 CRANE NUCLEAR INC.
VALVE SERIAL NUMBERS E1209, El210, El211, E1212 E1578,E1579,Ei580 E1591 E1597, E1598, E1599, El600, El601 2"
40224-02 2"
40224-03 5
7 Y..
40224-04 E1630, E1631, E1632, E1633, E1634, E1635, E1636 Each valve assembly above was subjected to a hydrostatic shell test performed in accordance with the ASME B&PV Code requirements, and witnessed by our Quality Control personnel. There was no weeping or valve body leakage noted on any of the valves during the duration of the hydrostatic shell or seat leakage test.
The potential failure mode is pressure boundary violation and loss of inventory however; Crane Nuclear is not able to quantify the loss of inventory or subsequent safety issues without application specifics.
While it was the customer that identified the valve body leakage to Crane Nuclear, a notification letter with the information above was sent to Dominion / Millstone today in accordance with their purchase order notification requirements. If you have any questions please contact me by phone at 630-226-4940, email mava@cranevs.com, or fax 630-226-4646.
Sincerely, CRANE Nuclear, In.
Rosalie Nava' Director Safety and Quality 4¢tA