ML20055G833

Responds to NRC Bulletin 90-001, Loss of Fill-Oil in Transmitters Mfg by Rosemount

ML20055G833
Person / Time
Site:	Wolf Creek
Issue date:	07/18/1990
From:	Rhodes F WOLF CREEK NUCLEAR OPERATING CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-90 ET-90-0115, ET-90-115, IEB-90-001, IEB-90-1, NUDOCS 9007240213
Download: ML20055G833 (5)

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W$LF CREEK NUCLEAR OPERATING CORPORATION j Foneet T. fthodes ve. Preseawn say wie a imahnew e- e e.

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July 18, 1990 i ET 90-0115 U. S. Nuclear Regulatory Cossaission ]

ATTN: Document Control Desk i Mail Station P1-137 l Washington, D. C. 20555 Subjects. Docket No. 50-482: Response to NRC Bulletin No. 90-01',

' Loss of Fill-Oil in Transmitters Manufactured by. (

Rosemount'  !

Gentlemen:

1 The purpose of this letter is to transmit Wolf Creek Nuclear Operating l

Corporation's (WCNOC) response to NRC Bulletin No. 90-01.. ' Loss of Fill-Oil

! in Transmitters Manufactured by Rosemount*'. The bulletin requested l L licensees to promptly identify and take appropriate corrective actions for

Model 1153 Series B. Model 1153 Series D, and Model'1154 transmitters-manufactured by Rosemount that may be leaking oil.  !

n 1 h The attachment to this letter provides the requested reporting . l

l. requirements. If you have any questions concerning this matter, .please contact me or Mr. H. K. Chernoff of my staff. ,

Very truly yours, .;

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, Lt Forrest T. Rhodes y Vice President y Engineering & Technical Services FTR/jra Attachment 3 ces R. D. Martin (NRC), w/a >

D. V. Pickett (NRC), w/a i M. E. Skow (NRC), w/a '

J. S. Wiebe (NRC), w/a t

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P.O. Som 411/ Surtngton, KS 0663s / Phone: (316) 364-8831

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Forrest T. Rhodes, of lawful age, being first duly sworn upon oath says.that he- is-- Vice President Engineering and Technical Services of Wolf Creek Nucle.1r Operating Corporations that he has read the foregoing document and-knows the content thereof that he has executed that.same for and on behalf of said Corporation with full power and authority to do sol and that the facts- therein stated are true and correct to the best of his knowledge, information and belief.

By /* ~

Forrest T. Rhodes Vice President Engineering & Technical Services 4 SUBSCRIBED and sworn to before me this / day of 1990.

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, Notary Public

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. . - i AttCchment to ET 90-0115 ~I P,sge 1 of 3 Respomes to NRC Bitilatin No. 90-01 i

l Reoortina Reauir nt 1.a):  !

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' Provide a response that confirms that. Items 1, 2, 3, 4, and 5 of Requested l Actions for Operating Reactors have been completed. ]

l Resnonser j

(< Items 1, 2, 3, 4.-and 5 of Requested Actions for Operating Reactors has been 'I u, . completed. Wolf Creek Nuclear Operating Corporation (WCHOC) identified 133 j p Rosemount Model 1153 transmitters that are currently installed in either  ;

safety-related- systems or systems installed 'in accordance with

( 10 CFR 50.62 (the ATWS rule). Four transmitters in use in the Reactor- i L' Coolant System that provide input to the Reactor Protection System were l identified as being from' the 'nanuf acturing lotc identified by Rosemount as _i having a high failure fraction due to a loss of fill-oil. These four ]

L transmitters were rebuilt by repiccing the sensors during Refuel IV which i b ended on May 16, 1990. A review of plant data for the 133 Model 1153 I

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l transmitters identified that- no transmitters had exceeded the operability L acceptance criteria reconsnended in the Rosemount Technical Bulletins. WCNOC has implemented-a program, which considered the actions in the NRC Bulletin, for monitoring transmitters for symptoms of loss of fill-oil.  ;

i Reoortina Reauirement 1.b):

Provide- a response that identifies the indicated manufacturers. the model I number:'the system the transmitte's was utilized int the approximate amount rf time at pressures the corrective actions taken and the disposition 4 (e.g.,- returned to vendor for analysis) of Rosemount 1153 Series B. .

Model 1153 Series D, and Model 1154 transmitters that are believed to have '

l' exhibited symptoms indicative of loss of fill-oil or have-been confirmed to have . experienced a lose of fill-oil. This should-include Model 1153 -)

Series B, .Model 1153 Series D, and Model 1154 transmitters manufactured j after July 11, 1990.

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! Resoonse The-transmitters listed below are believed to have exhibited symptoms indicative of loss of fill-oil:

MANUFACTURER: Rosemount MODEL: 1153HD5 COMPONENT: BB-FT0415 SERTAL NO.: 410331 INSTALLATION MTE: 5-26-85 TIME AT PRESSURE: 289 days REPLACEMENT MTE: 6-19-86 PSI NORTBS: 21530 (82235 PSI)

SYSTIDie Reactor Coolant System CORRBCTIVE ACTIONS: Sensor replaced and transmitter later installed at BB-FT0444 (10-21-86). Replaced sensor scrapped.

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, Attachmen+,to ET 90-0115' Page 2 of 3 Resoonee (con't):

BI&BUFACTURER: Rosemount teoDEL: 1153HD5 00BEPCEEBT BB FT0414 SERIAL NO.: 410330 INSTALLATION MTE: 6-1-85 tinge AT PRESSURE: 577 daye REPLACBIENT MTE: 10-21-86 PSI B005758: 28086 (42235 PSI)

SYSTEble Reactor Coolant System.

OORRECTIVE ACTICES: Sensor replaced and transmitter stored on site.

, Replaced sensor scrapped.

98450FACTURER: Rosemount DIDDEL: 1153HD5 0098PORENT: BB-FT0434 SnTAt NO.: 410337 INSTALLATICII MTE: 6-1-85 TIBIE AT PRESSURE: 64 dc.-

REPL&CBGENT MTE: 11-6-85 PSI 300RTES: 4F 4 .s43J jai)

' SYSTBt: Reactor Coolant System CORRECTIVE ACTICIIS: Sensor replaced and transmitter um tu a!.*c it BB-FT0415. Replaced sensor scr, W IIABUFACTURER: Rosemount HDDEL: 11. 'W COBEPOWERT: BB-FT0435 SatAt. go.: 4103,7

INSTALLATICII MTE

6-1 85 TIME AT PRESSURE: 377 days REPL&CBIEll? MTE: 10-21-86 PSI NORTRS: 28086 (42235 PSI)

SYSTEM: Reactor Coolant System CORRBCTIVE ACTIONS: Sensor replaced and transmitter stored on site..

Replaced sensor scrapped.

MAIBUFACTURER: Rosemount 98DDEL: 1153HD5 00btPOWERT: BB-FT0444 SnTAI NO. : 410340 INSTALLATI0Il MTE: 6-1-65 TIBGE AT PRESSURE: 377 days REPLACBIEllT MTE: 10-21 86 PSI NOIITES: 28086 ($2235 PSI)

Reactor Coolsnt System

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SYSTBla CORRBCTIVE ACTICIls: Transmitter scrapped.

MAIBUFACTURER: Rosemount idODEL: 1153HD5 C(B8P0HERT: BB-PT0445 SnTAI NO.: 410329 INSTALL &TICII MTE: 6-1-87 TItSt AT PRESSURE: 120 days L REPLACBIENT MTE: 10-2-87 PSI 900BITRS: 8940 (42235 PSI)

SYSTBit. Reactor Coolant System CORRECTIVE ACTIONS: Transmitter is on site for further completion of time response testing and submittal of data to Rosemount.

MAIBUFACTURER: Rosemount MODEL: 1153GB9 COMPORBIT: AB-PT0002 SnTAI NO.: 403135 INSTALLATI0Il MTE:- 11-9-83 TIl8E AT PRESSURE: 592 days REPLACBIEllT MTE ' 6-23-87 PSI M0llTHS: 19733 (4 1000 PSI)

SYSTEM: Main Steam System CORRECTIVE ACTI0llS: Returned transmitter to Rosemount 6-23-87.

MANUFACTURER: Rosemount MODEL: 1153DB3 CGitPOIIBIT: EN-LT0016 SERIAL NO.: 280382 INSTALLATI0Il MTE: 4-23-84 TIl8E AT PRESSURE: 0 (ATHOS)

REPLACBODIT MTE: 5-19-87 PSI MOIITBS:

SYSTEM: Containment Spray System CORRECTIVE ACTIONS: Transmitter scrapped.

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Attachment to ET 90-0115

, ' . . Page 3 of 3 Renortina Raouirement 1.c):

Provide a response' that identifies the system in which the Model 1153 Series B. Model 1153 Series D.. and Model 1154 transmitters from the manufacturing lots that have been identified by Rosemount as having a high failure fraction due to loss of fill-oil are utilized and provides a schedule for replacement of these transmitters which are in use in the reactor protection or engineered safety features actuation systems.

ResDonset WCNOC rebuilt four transmitters in use in the Reactor Coolant System that provide input to the Reactor Protection System during Refuel IV that were identified as being from the suspect manufacturing lots. No other transmitters-in use in the reactor protection or engineered safety features actuation systems were identified as being from the suspect manufacturing lots.

Renortina Reauirement 2.):

Model:1153 Series B. Model 1153 Series D.. and Model 1154 transmitters that, subsequent to providing the response required by Item 1 above, exhibit symptoms of loss of fill-oil or are confirmed to have experienced a loss of' fill-oil should be reviewed for reportability under existing NRC regulations. If determined not-to be reportable, addressees are requested to document and maintain, in accordance with existing plant procedures, information consistent with that requested Item 1.b) above for each transmitter identified.

ResDonse Rosemount Model 1153 Series B and D and Model 1154 transmitters that exhibit symptoms of loss of fill-oil or are confirmed to have experienced a loss of fill-oil that exceeds the operability acceptance criteria recommended in the Rosemount Technical Bulletins will be evaluated for reportability in accordance with existing NRC regulations. If determined not to' be reportable. Information consistent with thet. requested in Item 1.b);above will be documented and maintained.

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