ML20012G580
| ML20012G580 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/03/1993 |
| From: | Broughton T GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C311-93-2017, IEB-90-001, IEB-90-1, NUDOCS 9303090353 | |
| Download: ML20012G580 (4) | |
Text
' f1 GPU Nuclear Corporation G 1 Nuclear
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Middietown, Pennsylvania 17057-0480 (717) 944-7621 Writer's Direct Dial Nurnber; (717) 948-8005 March 3, 1993 C311-93-2017 U. S. Nuclear Regulatory Commission Document Control Desk l
Washington, D.C.
20555 Gentlemen:
Subject:
Three Mile Island Nuclear Station Unit I, (THI-1)
Operating License No. DPR-50 Docket No. 50-289 GPUN Response to NRC Bulletin 90-01, Supplement 1 Loss of Fill-O'l in Transmitters Manufactured by Rosemount This letter transmits the GPUN response to NRC Bulletin 90-01, Supplement 1.
In response to Bulletin 90-01 in July 1990, GPUN documented the number and application of Rosemount model 1151, 1152 and 1153 transmitters manufactured prior to July 11, 1989 in service at TMI-I (there are no model 1154 transmitters in service with sensing modules manufactured prior to July 11, 1989). At that time, an enhanced surveillance program.was implemented to trend operational and/or calibration data. Data evaluation has provided confirmation that the transmitters continue to perform their intended safety functions.
The actions taken at TMl-1 in response to Bulletin 90-01 were compared with I
those requested of operating reactors by Supplement I to the bulletin.
The l
results of the comparison confirmed that the enhanced surveillance program implemented at THI-l satisfies the updated action requested as outlined in Supplement 1.
Therefore, for those transmitters manufactured prior to July 11, 1989 remaining in service, as identified in Sections 1 and 2 of Attachment ~
1, GPUN will continue to implement the existing enhanced surveillance program.
Surveillance results are documented, evaluated and maintained by the Plant Materiel Assessment Group. Transmitters listed in Attachment I which exhibit indications symptomatic of failure due to fill-oil loss will be replaced or rebuilt with units containing sensing mcdules manufactured after July 11, 1989 in accordance with the THI-1 Corrective Maintenance Program.
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C311-93-2017 1
Page.2 of 2
! also identifies the specific GPUN commitments to take actions for i
transmitters in each of the pressure /use categories outlined in the supplement.
Two transmitters identified in section 1.b have been designated for replacement prior to the 10R outage. The option to replace these transmitters was chosen over that of performing enhanced surveillance because of the effort required to meet the quarterly monitoring requirement.
The accuracy of the enhanced surveillance program was evaluated against the guidelines in Rosemount Technical Bulletin #4.
Both methods used at TMI-1, transmitter calibration and operational data trending were found adequate to meet the guideline criteria. All actions requested by the bulletin supplement will be complete with the replacement of the two transmitters as noted in section 1.b of the attachment.
Sincerely, wk T.G.Brou(tton Vice President & Director, TMI-1 WGH Attachments cc: Administrator, Region 1 TMl-1 Senior Project Manager TMl Senior Resident Inspector
i Attachment I C311-93-2017 Page'I of 2 l
l THI-l Response to Actions Reouested by the NRC in IE Bulletin 90-01. Supolement 1 i
1.
Hiah Pressure (>l500 osia) Transmitters a)
Rosemount Model 1153 Series B and D transmitters manufactured prior to i
July 11, 1989, that are in service at THI-1 in either reactor protection trip systems, ESF actuation systems or ATWS applications are listed below:
Tag Model Application RC-PT-949 1153GD9 RC Wide Range Pressure (ATWS/ Reg Guide 1.97)
RC-PT-963 Il53GD9 RC Wide Range Pressure (ATWS/ Reg Guide 1.97)
These pre-July 11, 1989 transmitters, operating at a normal pressure in excess of 1500 psi and installed in the ATWS system, have exceeded the Rosemount 60,000 psi-month threshold criterion.
These " mature" transmitters will continue to be monitored using the current enhanced surveillance program on at least a monthly basis.
Repair or replacement will be scheduled and accomplished as warranted by trend 1
evaluation results.
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b)
Rosemount Model 1153 Series B and D transmitters manufactured prior to July 11, 1989, that are in service at TMI-l in safety related applications but are not installed in reactor protection trip systems, ESF actuation systems or ATWS applications are listed below:
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Tag Model Application MU24A-FT ll53HB5 Low Range Make-up Flow (Reg Guide 1.97)
MU248-FT 1153HB7 High Range Make-up Flow (Reg Guide 1.97) 4 RC-LT-777 11530D5 Pressurizer Level (Reg Guide 1.97)
These transmitters are " mature", having exceeded the Rosemount 60,000/130,000 psi-month threshold criterion, and have exhibited no trend pattern indicative of a loss of fill-oil failure. Transmitters i
MU24A-FT and MU24B-FT will be replaced before the 10R outage (September 1993) due to the difficulty in meeting the enhanced monitoring requirements of ICB 90-01, Supplement 1.
Transmitter RC-LT-777 will be 1
monitored using the enhanced surveillance program currently in place on i
at least a quarterly frequency.
Its repair or replacement will be scheduled and accomplished as warranted by trend evaluation results.
C311-93-2017 Page 2 of 2 Medium Pressure (500 to 1500 osia) Transmittersd prior to 2.
Rosemount Model 1153 Series B and D transmitters manu ESF following July 11,1989,and non-ATWS applications at THI-l are identified in the list:
Model Application OSTG A Full Range Level (FW/ Reg Guide 1.97)
Tag OSIG B full Range Level (FW/ Reg Guide 1.97)
FW-LT-775 1153DD5 OSTG B full Range Level (FW/ Reg Guide 1.97)
Il53DD5 FW-LT-776 OSTG A full Range Level (FW/ Reg Guide 1.97) 1153D05 FW-LT-788 (HSPS/ Reg Guide 1.97) 1153DD5 FW-LT-789 ll53GD9 OTSG A Pressure MS-PT-950 h
These transmitters are " mature", having exceeded the 60,000 indicative of threshold criterion, and have exhibited no trend patternAlthough not r illance a loss of fill-oil failure.
these transmitters will be monitored using the enhan program. warranted by trend evaluation results.
Low Pressure (<500 psig) Transmitters i
to 3.
Rosemount Model 1153 Series B and D transmitters manufactured ESF and July II,1989, that are in service in low pressure non-RPS, non-non-ATWS applications are listed below:
Application Model Tag Wide Range Containment Pressure A BS-PT-0981A Il53GD7 Narrow Range Containment Pressure A BS-PT-0981B 1153GD5 Wide Range Containment Pressure B BS-PT-0982A Il53GD7 Narrow Range Containment Pressure B BS-PT-09828 1153GD5 BWST/Na0H Differential Pressure DH-DPT-0819 1153005 1CCW Tank Level A IC-LT-0802 1153004 1CCW Tank Level B IC-LT-0803 1153D84 Make-up Tank level MU14-LT 1153DD4 Make-up Tank Level MU-LT-0778 1153004 NSCCW Surge Tank Level A NS-LT-800 11530D4 NSCCW Surge Tank Level B NS-LT-801 1153DD4 RCS Draindown level RC-LT-1037 1153005 fa These transmitters currently exhibit no trend pattern indica d by the supplement, however, the ability to detect loss of fill-oil failure.
maintained.
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C311-93-2017 Page 2 of 2 2.
Medium Pressure (500 to 1500 osia) Transmitters Rosemount Model 1153 Series B and D transmitters manufactured prior to that are in service in RPS, ESF, ATWS, non-RPS, non-ESF July 11, 1989, and non-ATWS applications at TMI-l are identified in the following list:
Tag Model Application FW-LT-775 1153DD5 OSTG A full Range level (FW/ Reg Guide 1.97)
FW-LT-776 1153DD5 OSTG B Full Range Level (FW/ Reg Guide 1.97)
FW-LT-788 1153005 OSTG B Full Range Level (FW/ Reg Guide 1.97)
FW-LT-789 1153DD5 OSTG A Full Range Level (FW/ Reg Guide 1.97)
MS-PT-950 1153GD9 OTSG A Pressure (HSPS/ Reg Guide 1.97)
These transmitters are " mature", having exceeded the 60,000 psi-months threshold criterion, and have exhibited no trend pattern indicative of a loss of fill-oil failure. Although not required by Supplement 1, these transmitters will be monitored using the enhanced surveillance Repair or replacement will be scheduled and accomplished as program.
warranted by trend evaluation results.
3.
Low Pressure (<500 psig) Transmitters Rosemount Model 1153 Series B and D transmitters manufactured prior to July 11, 1989, that are in service in low pressure non-RPS, non-ESF and non-ATWS applications are listed below:
Tag Model Application BS-PT-0981A 1153GD7 Wide Range Containment Pressure A BS-PT-0981B 1153GD5 Narrow Range Containment Pressure A BS-PT-0982A 1153GD7 Wide Range Containment Pressure B BS-PT-0982B 1153GD5 Narrow Range Containment Pressure B DH-DPT-0819 1153D05 BWST/NaOH Differential Pressure IC-LT-0802 1153DD4 ICCW Tank Level A IC-LT-0803 1153DB4 ICCW Tank Level B MU14-LT 1153DD4 Make-up Tank Level MU-LT-0778 1153DD4 Make-up Tank Level NS-LT-800 ll53DD4 NSCCW Surge Tank Level A NS-LT-801 1153004 NSCCW Surge Tank Level B RC-LT-1037 1153DD5 RCS Draindown Level These transmitters currently exhibit no trend pattern indicative of a loss of fill-oil failure.
The enhanced surveillance program currently in place for these transmitters will be discontinued as permitted by the supplement, however, the ability to detect failures will be maintained.
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