ML20126D721

Potential Part 21 Rept Re Actual Performance of Rosemount Supplied Bailey Bq Differential Pressure Transmitters Differing from Rosemount Original Spec.Bailey Controls Encl.Evaluation Not Yet Performed

ML20126D721
Person / Time
Site:	Columbia, Midland, Bellefonte
Issue date:	12/16/1992
From:	Taylor J BABCOCK & WILCOX CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-92 JHT-92-276, NUDOCS 9212280125
Download: ML20126D721 (6)

Text

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BW BGW NUCLs?AR TECHNOLOGIES ant l92-276 3 15 O'd I'"*" **d l

December 16, 1992 lyndeurg V 4 60 f5 itinhme 804 385 2000 T,'lecopy 804 385 3663 Document Control Desk U.S. Nuclear Regulatory Commission, Washington, D.C. 20555

Subject:

Potential Safety Issuo Regarding Bailey BQ Differential Pressure Transmitters Gentlemen:

The purpose of this letter is to advice you of a concern regarding Bailey BQ Differential Pressure Transmitters that may have safety implications.

The concern arose as the result of a letter from Bailey controls Company dated October 15, 1992. Bailey advised that they had received a notification from their sub-vendor, Rosemount, to the effect that the actual performance of a Rosemount supplied component differs from Rosemount's original specification. This requires a change in Bailey's published product literature and qualification reports. Bailey characterizes the changes as relatively small. A copy of the Bailey letter is attached.

The change in performance is in the static pressure effect on span. In three of the six types of transmitters corresponding to three differential pressure ranges, the changes result in an improvement in transmitter performance; and, in three, the changes are non-conservative. B&W Nuclear Technologies (BWNT) has learned that the component involved is the sensing element that was procured by Bailey from Rosemount. The revised static pressure effect data is based on new testing information that Rosemount obtained from their calibration and test facility.

BWNT supplied the BQ transmitters to the Bellefonte Units 1 and 2 of TVA, to the WNP-1 unit of Washington Public Power Supply system, and to the Midland units of Consumers Power Company.

Bellefonte and WNP-1 are presently in a deferred status of constructior,. The Midland units were canceled.

TVA has informally advised that they are now in the process of evaluating the use of +%ese transmitters.

BWNT has not performed an evaluation to determine if the subject concern has safety significance and is reportable under 10CFR21.

BWNT is, therefore, notifying TVA, Supply System and Consumers 9212280125 921216 I gDR ADOCK 05000329 l

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U. S. HRC l JitT/92-276 i

.Docomber 16, 1992 Page 2 i

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Power of this concern for their uvaluation. DWHT plans no further ovaluation of this matter for reportability unless  :

requested and authorized by the utilities. ,

i This informational lottor to the NRC is not a notification under I 10CFH21.

Please contact the undersigned at (804) 385-2817 if you have any questions concerning this matter, or you may contact Mr. David Mars at (804) 385-2852. j Yours very truly, e .m g/

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-Manager, Licensing Services l JitT/bcc j i

Attachment j ca s . B. S. Schoflold, TVA '!

L. C. Oakes, WPPSS a i

R. Bockor, CPCo E. E. Mahoney, Bailey F. C. Sillag, Bailey l r

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- - 'JU) .2 1992 Bailey Controis Company 29601 Escud A.enue

• WoWo. ONo 440921696 V 3 A

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Balley' 15 October, 1992 B&W Nuclear Service Company P. O. Box 10935 Lynchburgh, VA 24506-0935 Attention: Mr. J. H. Taylor Manager, Licensing Services

Subject:

Notification of Potential Deviation

Dear Mr. Taylor:

Bailey controls company has long been a leader in the supply of control and safety system components for the nuclear industry.

The safety and quality of nuclear qualified products are of paramount concern to Bailey. Our designs and the manufactured or purchased materials of which they are constructed are carefully scrutinized to assure that we maintain quality and performance as we c antinue to support the needs of our nuclear utility customers.

On September 1st, we received notification from a sub-supplier (Rosemount, a division of Emerson Electric) that on June 23rd they became aware that the actual performance of a Rosemount supplied component varied from Rosemount's original specification. This announcement by Rosemount requires a change inThe Bailey's previously revised product published product performance specifications.

performance specification more accurately reflects the measurement s

of the static pressure effect on span for type N_BQ nuclear differential pressure transmitters. These changes are relatively small and, in three of the six ranges offered by Bailey,Bailey's result in an improvement in the overall transmitter performance.

report under 10 CFR 21 is included as an attachment to this letter.

The affsets, if any, of this specification change are very application specific. For this reason, we are unable to precisely determine the importance of this change for each of our customers.

Accordingly, we have classified thisthis change as adess classification potential not require a deviation. As you are awar6, notification to be sent to the NRC. We do urge you, however, to review your system error calculations and take any indicated corrective actions.

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~ l Bailey is notifying its customers of this change in our specifications as a result of our commitment to Bailey's Total Quality Assurance Program. Bailey stands ready to supply any I support that you may need in evaluating the significance of this I change. Please feel free to contact either Frank Sillag (216) 585-5711 or myself (216) 585-7832.

Very truly yours, E. E. ahoney Director, Quality Assurance l

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BAILBY CONTROLS COMPANY Safety Concern Report SCR-067 Rev. Original 15 October 1992 10CFR21 report issued by:

Mr. Edward E. Mahoney Director of Quality Assurance Phone: (216) 585-7832 Dailey controls Co. Fax: (216) 585-5090 29801 Euclid Ave.

Wickliffe, OH 44092 Items supplied:

Bailey type N_BQ nuclear qualified differential pressure transmitters Items supplied by:

Bailey Controls Co.

29801 Euclid Ave.

Wickliffe, OH 44092 Potential Deviation:

The effect of static pressure on span differs from that previously specified in product literature and qualification reports as follows:

systematic static pressure effect on span Bailey Nomenclature New Span shift Old Span Shift

(% input /1000 psi) (% input /1000 psi) i Range Digit 4

W 1 BQ 7 _ _ _ _

N 2 BQ 7 _ _ _ _

N 3 BQ 7 _ _ _ _

N 1 BQ s _ _ _ _

N 2 BQ s _ _ _ _

N 3 BQ 3 ___

4 3 1.75%. 1.5%

4 0.87% 1.0%

5 0.81% 1.0%

6 1.45% 1.0%

7 1.05% 1.0%

s 0.55% 1.0%

(Correction uncertainty is 10.25% of reading per 1000 psi with-the exception of the: new span ef fect for range 3 - (30" H O range) 2 which.is to.50% of' reading per 1000 psi.)

l E As a result, a control cr safety system having input from'an N_BQ transmitter may not perform within the limits of the safety l analysis-calculations.

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c This change came to our attention on:

1 September 1992 This change applies to All N_BQ nuclear qualified differential pressure transmitters of the nomenclatures listed above.

corrective action:

i Bailey controls Co. is providing this notice to its customers. l Qualification reports and product literature will be revised as appropriate to include the changed specification.

Our customer is advised as follows:

system error calculations based on inputs from Bailey N_BQ -

differential pressure transmitters should be reviewed to determine the consequences of the reported changes. The safety implications, if any, should be evaluated and appropriate action taken.

I Bailey controls Co. remains committed to serving the needs of our nuclear utility customers as well as our total worldwide customer base. We apologize for any inconvenience this change in product specification may cause you. Bailey stands prepared to provide any support you may require in the evaluation of this spocification change. We trust that you will continue to look to Bailey for your continuing control needs. please direct questions or comments regarding this notification to Ed Mahoney (216) 585-7832 or Frank Sillag (216) 585-5711.