[Pansophy] Rework Done: NCR:530 on SNSPPU-CLNRM-CST-LEAK-R1--7

[Megan McDonald]

Naeem,
Can you please provide some reasoning for the reopening for us to add to the comments in the database? This helps us if we are questioned about its reopening in the future.
Thanks!
Megan

From: Pansophy <pansophy-bounces at mailman.jlab.org> On Behalf Of Naeem Huque
Sent: Thursday, June 16, 2022 8:26 AM
To: pansophy <pansophy at jlab.org>
Subject: Re: [Pansophy] Rework Done: NCR:530 on SNSPPU-CLNRM-CST-LEAK-R1--7

Hello,

Could this please be reopened

Thanks,
Naeem
________________________________
From: Naeem Huque <huque at jlab.org<mailto:huque at jlab.org>>
Sent: Monday, June 13, 2022 10:14 AM
To: pansophy <pansophy at jlab.org<mailto:pansophy at jlab.org>>
Subject: Fw: Rework Done: NCR:530 on SNSPPU-CLNRM-CST-LEAK-R1--7

Hello,

Could you please re-open this NCR

Thanks,
Naeem
________________________________
From: FOREHAND at JLAB.ORG<mailto:FOREHAND at JLAB.ORG> <FOREHAND at JLAB.ORG<mailto:FOREHAND at JLAB.ORG>>
Sent: Monday, June 13, 2022 8:22 AM
To: Danny Forehand <forehand at jlab.org<mailto:forehand at jlab.org>>
Cc: Ed Daly <edaly at jlab.org<mailto:edaly at jlab.org>>; Naeem Huque <huque at jlab.org<mailto:huque at jlab.org>>; Danny Forehand <forehand at jlab.org<mailto:forehand at jlab.org>>; Juan Jordan <jjordan at jlab.org<mailto:jjordan at jlab.org>>
Subject: Rework Done: NCR:530 on SNSPPU-CLNRM-CST-LEAK-R1--7


An Staff/Technician has reworked Non-Conformance Report - sequence number 530 for traveler SNSPPU-CLNRM-CST-LEAK-R1--7.
PAGE 3: MODIFICATION/RE-MEASURE
Rework Staff:
JJORDAN
JJORDAN
FOREHAND

Rework Date:
15-May-2022
17-May-2022
20-May-2022

Rework Comment:
15May2022 Bagged bellow joints between cav 2 and 3 separately to purge with nitrogen and identify leak. Cav 2 downstream leak sized at 4.96e-06 Torr L/s Cav 3 upstream no leak detected. Started bagging Cav 1 and 2 section. 16May2022 Finished bagging between Cav 1 and 2. Purging bellows with nitrogen while spraying one FPC at a time with He. Cav 1 FPC no leak detected. Cav 2 FPC Leak sized at 1.28e-07 Torr L/s. After allowing scan to recover started with Cav 1 downstream bellows no leak detected. Cav 2 upstream bellows leak sized at 3.98e-09 Torr L/s. Increased torque for all 3 flanges to 35 ft lbs. Cav 2 downstream bellows now at 1.06e-06 Torr L/s. Cav 2 upstream bellows now at 2.67e-09 Torr L/s. Cav 2 FPC no leak visible.
17May2022 Increased torque on Cav 2 upstream and downstream to 40 ft lbs. Cav 2 downstream bellows now at 4.41e-07 Torr L/s. Cav 2 upstream bellows now at 3.4e-09 Torr L/s. Increased torque on Cav 2 upstream and downstream to 45 ft lbs. Cav 2 downstream bellows now at 3.6e-07 Torr L/s. Cav 2 upstream bellows now at 4.12e-09 Torr L/s String isolated to swap over to slow bleed up line. Slow bleed up started at 2:06pm.
18May2022 Gasket changed on Cav 2 upstream 19May2022 Bellows changed between Cav 2-3. Slow pump down started. 20May2022 Leak in bag 3 sized at 1.72e-08 Torr L/s. Leak in bag 4 sized at 3.49e-09 Torr L/s. Bagged Cav 2-3 bellows individually as well as Cav 2 upstream and FPC. Started narrowing leaks down after lunch. Cav3 upstream no leak visible after 5 mins of helium spray. Cav2 downstream leak sized at 1.35e-08 Torr L/s. Cav2 upstream leak sized at 3.05e-09 Torr L/s. Cav 2 FPC leak sized at 3.27e-11 Torr L/s. Increased torque on Cav2 upstream and downstream to 50ft lbs. Cav2 downstream no leak detected. Cav2 upstream no change.

Verify Staff:
FOREHAND
FOREHAND
JJORDAN

Verify Date:
15-May-2022
17-May-2022
20-May-2022

Verify Comment:





ENGINEER RESPONSE
Response Engr:




Response Date:




Disposition:
Hold/Modify
Disposition Comment:




PAGE 2: FIRST DISPOSITION
Response Engr:
FOREHAND
Response Date:
08-Jun-2022
Disposition:
Hold/Modify
Disposition Comment:
Try to improve leaks to an acceptable rate before turning over string to CMA.

PAGE 1: INITIATE AND DESCRIBE
SN:
PPU-06
SNtype:
CSTSN
DRAWING NUM:
104211500-M8U-8200-A001
PART DESCRIPTION:
CRYO STRING ASSEMBLY
TRAV_ID:
SNSPPU-CLNRM-CST-LEAK
TRAV_REV:
R1
TRAV_SEQ_NUM:
7
DESCRIBE STAFF:
FOREHAND
DESCRIBE DATE:
2022-06-08 15:18:00.0
DESCRIBE COMMENT:
The total leak rate of the string is higher than the specified 3E-10 Torr l/s. The first leak is approx. 3.3E-6 Torr l/s. The second is approx. 6.5E-8 Torr l/s.
NOTIFICATION COMMENT:


The NCR is at the following URL: 530<https://pansophy.jlab.org/pansophy/Travelers/TRAVELER_FORM.cfm?project=SNSPPU&area=SNSPPU&system=CLNRM&TRAV_ID=SNSPPU-NCR&TRAV_REVISION=R12&page=3&maxpage=4&TRAV_SEQ_NUM=530&travstat=&serialnum=PPU-06&SN=PPU-06&SNTYPE=CSTSN>
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