ML103000402
| ML103000402 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/21/2010 |
| From: | Public Service Enterprise Group |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0334, 20462034 | |
| Download: ML103000402 (8) | |
Text
Notification Overview Run Date: 09/21/2010 Run Time: 08:11:36 Nucear LLC ul LNotification Page: 1 of 20462034 2
Notification 20462034 Notification type N1 Description Basis AFW Discharge Line Design Pressure Nuc. Maint. Request Reporter CRA WFORD2 754 10:49:34 Notification date 05/05/2010 Start date 06/17/2010 End date 07/01/2010 Start time 11:27:49 End time 11:27:49 Priority 5 C-Routine Sig. Level 5 Main WorkCtr. S-EDMO0 Funct. location SCAF AUXILIARY FEEDWA TER (SALEM)
Equipment Assembly Order 70110267 PM planner grp 099 Nuclear Default
- Long Text Object Identification**************
Notification 000020462034 Long text 05/05/2010 10:49:34 NUCLEARNOT (NUCLEARNOT)
Notification submitted by: Michael Crawford 856-339-2754 ENTNBU\NUMEC:
CONDITION DESCRIPTION/LOCATION (THE INAPPROPRIATE ACTION AND ITS NEGATIVE EFFECT/INCLUDE A -DETAILED LOCATION DESCRIPTION):##
corrosion resulting in piping having legs than minimum wall thickness based on the design pressure for the piping. The Pipe Specification S-C-MPOO-MGS-0001, SPS54E lists the design pressure as 1950 psi and the maximum normal operating pressure as 1195 psi. An evaluation determined that the maximum credible operating pressure for this piping was approximately 1300 psi. This raised the question as to the design basis for the 1950 psi design pressure and whether it is higher than necessary. A search has not found a definitive basis for the 1950 psi number. Several possibilities exist, although the best estimate is the turbine driven AFW pump operating at shutoff head at 4000 rpm, but this event has not been fully investigated to determine if it is credible. Notification is to provide the design basis for the 1950 psi design pressure for the AFW common discharge piping.
ACTIVITIES, PROCESSES, PROCEDURES INVOLVED:
Substantiation of the Design Basis for the AFW piping design pressure.
WHY DID CONDITION HAPPEN?
The need to substantiate AFW common discharge pipe minimumr wall thickness resulted in challenging the design pressure as higher than necessary because basis for 1950 psi could not be definitively established.
CONSEQUENCES:
Corroded pipe in Unit 1 was replaced. Establishment of the design basis essential for configuration control.
SAtihi6i-nfhyei *i-is n-t o-cons eq cjge-i:C*=*asAFW--st i'gifr-alto nfd it 6 ar49 50 sirem-ai ns the design pressure.
REQUIREMENTS IMPACTED:
None.
ADVERSE PHYSICAL CONDITIONS:
None.
WHO WAS NOTIFIED:
Design Engineering Director, Manager and Mechanical Branch Manager.
KNOWLEDGEABLE INDIVIDUALS:
Pat Ayers, Michael Crawford, Kevin King, Mohammad Ahmed -- Design Engineering REPEAT OR SIMILAR CONDITION:
Notification Overview 0 PSEG Run Date:
Run Time:
Page:
09/21/2010 08:11:36 2 of 2 Nuclear LLC Notification 20462034 Not a repeat condition. Similar condition exists at Unit 2 with same design pressure for AFW common discharge pipe having design pressure of 1950 psi.
IMMEDIATE ACTIONS AND RECOMMENDED ACTIONS:
No immediate actions necessary. Recommended action as follows:
Assign to Design Engineering: establish the design basis for 1950 psi design pressure.
4 Not Applicable TSCO STEVEN B MILLER NFF Not a Functional Failure TSCO End of report
Work Order Shop Papers 09/21/2010 O PSEG Nuclear LLC 70110267 Order: 70110267 Basis AFW Discharge Line Design Pressure Order Type NUCR Status Notification 20462034 Unit SC Functional Location SCAF AUXILIARY FEEDWATER (SALEM) .
Equipment Assembly Location Room System AF Priority 5 C-Routine Main Work Center S-EDMOO HENNESSY, PHIL (Mech/Structural Mgr)
Status Basic Dates: Start: 09/08/2010 Finish: 09/08/2010 Overdue:
Sfty RItd/QA Reqd Sfty Class Mrule Code NFF-SEISMIC EQ Permission Date:
to Begin Work Time: 00:00:00 Description of Work Basis AFW Discharge Line Design Pressure
- Long Text Object Identification**************
Notification 000020462034 Long text 05/05/2010 10:49:34 NUCLEARNOT (NUCLEARNOT)
Notification submitted by: Michael Crawford 856-339-2754 ENTNBU\NUMEC:
CONDITION DESCRIPTION/LOCATION (THE INAPPROPRIATE ACTION AND ITS NEGATIVE EFFECT/INCLUDE A DETAILED LOCATION DESCRIPTION):##
- I --
SAFETY: The Only C. H.0.1. C. E.
Commitment Help Oversight Involvement Pr!,i 1 Nf 9
Work Order Shop Papers 09/21/2010 0 PSEG Nuclear LLC During the Unit 1 1R20 Outage the buried AFW discharge piping was found to have heavy external corrosion resulting in piping having less than minimum wall thickness based on the design pressure for the piping. The Pipe Specification S-C-MPOO-MGS-0001, SPS54E lists the design pressure as 1950 psi and the maximum normal operating pressure as 1195 psi. An evaluation determined that the maximum credible operating pressure for this piping was approximately 1300 psi. This raised the question as to the design basis for the 1950 psi design pressure and whether it is higher than necessary. A search has not found a definitive basis for the 1950 psi number. Several possibilities exist, although the best estimate is the turbine driven AFW pump operating at shutoff head at 4000 rpm, but this event has not been fully investigated to determine if it is credible. Notification is to provide the design basis for the 1950 psi design pressure for the AFW common discharge piping.
ACTIVITIES, PROCESSES, PROCEDURES INVOLVED:
Substantiation of the Design Basis for the AFW piping design pressure.
WHY DID CONDITION HAPPEN?
The need to substantiate AFW common discharge pipe minimum wall thickness resulted in challenging the design pressure as higher than necessary because basis for 1950 psi could not be definitively established.
CONSEQUENCES:
Corroded pipe in Unit 1 was replaced. Establishment of the design basis essential for configuration control. At this point their is not consequence as AFW system restored to original condition and 1950 psi remains the design pressure.
REQUIREMENTS IMPACTED:
None.
ADVERSE PHYSICAL CONDITIONS:
None.
Design Engineering Director, Manager and Mechanical Branch Manager.
KNOWLEDGEABLE INDIVIDUALS:
Pat Ayers, Michael Crawford, Kevin King, Mohammad Ahmed -- Design Engineering REPEAT OR SIMILAR CONDITION:
Not a repeat condition. Similar condition exists at Unit 2 with same design pressure for AFW common discharge pipe having design pressure of 1950 psi.
IMMEDIATE ACTIONS AND RECOMMENDED ACTIONS:
No immediate actions necessary. Recommended action as follows:
Assign to Design Engineering: establish the design basis for 1950 psi design pressure.
SAFETY: The Only C.H.O.I.C.E.
Commitment Help Oversight Involvement
- - I -
Operation List Sur nmary 09/21/2010 O ANuclear 'SEGLLC 70110267 OP Sub Work Description Start Date Work No Durtn i
Op. Center
_ _ _ _ _ _ _ I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
0001 S-EP03 Downgraded op 10 SL4 08/02/20 10 0.0 0 0.0 to SL5 7/29/10 per S-EDMi 1 determine basis 1950 09/08/20110 1.0 1.0 0010 design afw press S-EP02 ENTER TREND CODING 09/08/20110 1.0 1.0 0020 SAF:ETY: The Only C.H.O.I.C"E.
Commitment Help Oversight Involvement Communication
- T Empowerment Page 1 of 1
Operation Key Info 09/21/2010 O PSEG NuVclear LLC 70110267 Order: 70110267 Basis AFW Discharge Line Design Pressure Operation: 0001 Downgraded op 10 SL4 to SL5 7/29/10 per Work center: S-EP03 NNUC Status:
Number of People: 0 Scheduled Dates: Start: 08/02/2010. Finish: 08/02/2010 Planned Hours: 0.0 Actual Dates: Start: 08/02/2010 Finish:08/02/2010 Actual Hours: 0.000 Personnel Number:
Completion Confirmation Number: 8423188
. . C fiDw griaded Tex :- t o 7/29/10... . ... ..... .....
Downgraded op 10 SL4 to SL5 7/29/10 per Downgraded op 10 SL4 to SL5 7/29/10. per MRC.
Signature: MICHELE L LANDIS Description of Work:
Downgraded op 10 SL4 to SL5 7/29/10 per MRC.
- Long Text Object Identification**************
Order 000070110267 Operation 0001 Long text SAFETY: The Only C.H.O.I.C.E.
Commitment Help Oversight Involvement Communication Empowerment M 4- .1 -L 1)
Operation Key Info 09/21/2010 0 PSEG Nuclear LLC Order: 70110267 Basis AFW Discharge Line Design Pressure Operation: 0010 determine basis 1950 design afw press Work center: S-EDM11 NNUC Status:
Number of People: 1 Scheduled Dates: Start: 09/08 /2010 Finish: 09/08/2010 Planned Hours: 1.0 Actual Dates: Start: 07/12/ 2010 Finish:07/12/2010 Actual Hours: 0.000 Personnel Number:
Completion Confirmation Number: 8252755 Confirmation Text:
Extension
~Extensio n" This task is to determine the basis for the AFW design pressure. There is no impact on safety, reliability or system function. Extension to 10/27/10 is lAW LS-AA-125, and has the approval of the Design Engineering Mechanical/Structural Branch Manager.
Signature: KEVIN C KING Description of Work:
SAFETY: The Only C.H.O.I.C.E.
Commitment Help Oversight Involvement Communication Empowerment
Operation Key Info 09/21/2010 O PSEG Nuclear LLC Order: 70110267 Basis AFW Discharge Line Design Pressure Operation: 0020 ENTER TREND CODING Work center: S-EP02 NNUC Status:
Number of People: 1 Scheduled Dates: Start: 09/0 8/2010 Finish: 09/08/2010 Planned Hours: 1.0 Actual Dates: Start: Finish:
Actual Hours: 0.000 Personnel Number:
Completion Confirmation Number 8252756 Confirmation Text:
Signature:
Description of Work:
SAFETY: The Only C.H.O.I.C.E.
Commitment Help Oversight Involvement Communication Empowerment