ML20028B276

Nonproprietary Version of Crystal River Unit 3 Reactor Protection Sys Instrument Accuracies. Affidavit for Withholding Proprietary Info Encl

ML20028B276
Person / Time
Site:	Crystal River
Issue date:	11/19/1982
From:	BABCOCK & WILCOX CO.
To:
Shared Package
ML19295G619	List: ML20028B273 ML20028B276
References
TAC-48844, NUDOCS 8211300233
Download: ML20028B276 (33)

Text

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ATTACHMENT A CRYSTAL RIVER UNIT 3 RPS INSTRUMENT ACCURACIES NON-PROPRIETARY 4

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82113002:K3 821119 l PDR ADOCK 05000302 P PDR _

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CRYSTAL RIVER 3 RPSInstrtbantAccuracies I

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H BABCOCK & WILCOX Nuclear Power Group Nuclear Power Generation Division P. O. Box 1260 ,

Lynchburg, Virginia 24505 I

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1. INTRODUCTION The imposition of the current Quality Assurance (QA) program defined by QA SpeciEication 09-1212-01 for another customer necessitated a review of the equipment qualification program as presented in BAW-10003, " Qualification Testing of Protection System Instrumentation," to determine its conformance to the more stringent requirements of the current QA program. This review indicated that the majority cf the equipment presented in BAW-10003 was still qualified and traceable under the current QA progree. However, certain cab" inet-mounted modules did not have qualification records of sufficient quality to meet the new QA program requirements. The qualification records of these modules do not provida a traceable link between the test data and the re-ported results.

In order to generate the necessary quality, a requalification program con-forming to IEEE 323-1971 was completed for the affected modules. This pro-gram resulted in module errors greater than the previous values reported in RAW-10003. In order to evaluate the effect of the increased module errora on the Safety Analysis, string error calculations were performed using the new module errors. The error combination meth dology that had been used in the '

past had not been documented sufficiently, and string errors reported pre-viously using the original test data could not be reproduced.

In order to complete this documentation link and provide auditability, B&W developed an up-to-date error combination methodology which addresses process j errors, calibration and setability inaccuracies, functional gains, and reac-tor coolant flow normalization procedures. This methodology is fully docu-mented and auditable, and it was used in making the new string error calcu-lations.

The objective of this report it to describe in detail how the latest set of module and (subsequently) string errors were calculated for Crystal River 3.

l Where data are available, the original errors are compared with the later- 1 g_y ' Babcock & Wilcox l

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information. To show the combined effects of revised errors and methodology, a detailed calculation of the flow string error is provided. The error,that is determined is then included in a calculation of the Technical Specification setpoint for the flux / flow ratio.

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2. EQUIPMENT DESCRIPTION Figures 1 through 7 are block diagrams of the instrument strings in the reac-tor protection system (RPS). Most of the modules within the strings were manufactured by the Bailey Controls Company. Exceptions are the Rosemount 1152 pressure transmitter, the Mercoid pressure switch, and the Westinghouse uncompensated ion chambers. Crystal River 3 instruction manuals and spare parts identifier matrixes were the sources used to develop the diagrams. The error equation for each string is shown with the appropriate figure.

This section deals with the specific hardware errors only and does not ad-dress process variable measurement errors, i.e., flow noise, heat balance error for neutron flux calibration, etc.

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Figure 1. NI/RPS HI Temperature, Trip RTM RTD l LB SC l BI RTD , Linear Bridge Signal Converter Bistable

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'$1) RTD & Linear Bridee - Rose:r.ount 177 HW & 414E.

(2) Sienai conver er iTe= ' - 6623737A2 (3) Bistaoie - 652150001 ..

(4) Reac:ce Trio M:dule - 6622395A1 String Error = -

CAL Range - = .

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I O Figure 2. NI/RPS ill and LO Pressure Trip RTM b .

j Pres. , s. Buffe w HI Bistable EUR y LO Bistable (1) Press. XMTR - Rosemount 1152GP (2) Buffer - 6621670A1134 (3) Bistaole - 6621500D1 ,

(4) Reactor Trio Module - 6622395A1 .

Strino Error =

Cal. san;e =

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, Figure 3. NI/RPS ariable LO Pressure Trip

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p RTD ,

Linear SC Bridge O

Setpoint

,i BA Bistable RTM IN v

(1) RTD & Linear BR. - Rose =ount 177 HW 414E ,

(2) Signal conver:er foress) - 6623737A2 -

(3) Press. XMTR - P.osemount il52GP *

(4) Buffer AMP - 6621670A1134 (5) Bistaole - 6621600 01 (6) Reactor Trio Module - 6622395A1 String Error =

Cal. Rance =

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Figure 4.' HI Reactor Building Pressure Trip O

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Pres. Contact RTM Switc Buffer .

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(1) Blda. Press. Swit:h - Mercoid (2) Contac: 6uf er - 6623599A2 (3) ,

Reactor irto **cduie - 6522395A1 -

String Error =

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s Figure 5. NI/RPS Overpower Trip i UCIC

Linear AMP 3

' Bistable c/A l

n UCIC ( Linear ~ N J

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-(0) UC C - WL-23636.A (1) ETitear A:9 - 6621720J221 ,

(2) Su- / Di f f . AMP - 6525202A041 '

(3) Bistacle - 662150001 '

(4) Rea ar Trio Mocuie - 6622395A1 -

String Error =

Cal. Rance =

. =

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I Figure 6. NI/RPS Power / Pumps Trip ,

j n UCIC LA

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i D J gf p Setpoint Bistable ~

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RTM IN 3

C0n Pump E p,0 nth V Inputs

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(D) UCIC - WL-23636- A .

(1) Sum /Diff. AMP - 662502A041 (2) Linear AM? - 6621720J221 (3) Tontac- Mont or - 6521c95A2

{4) Bistacie - 6621500D1 (5) Ractor Trio Mocule - 6622395A1 5trina Error = *

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Cal. Rance l

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Figure 7. NI/RPS Power-Imbalance-Flow Trip El I */A E2 3 f .

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O UCIC LA dP

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g Function Bistable l y ,enerator a ,:e tocin:

.n I dP r

BA RTM .

(0) UCIC - WL-23636-A (1) Linear AtG - 66217200221 (2) Diif. A:9 - 662863A000 i (3) Sum /Diff. A;G - 6625202A041 (4) Funetton Gen - 6625027Al (5) 3.P XMTR - BY3X41-A -

(6) Sq. Roc: Extrac:or - 6623752A5 (7) Buffer A.:@ - 6621670A01102 (8) Bistable - 662150001 (9) Reactor Tric ecuie - 6622395A1 2-8

Figure 7 (Cont'd)

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. 3. METHODS DISCUSSION The method for calculating string errors is the linear addition of worst-case errors. The error equations were developed by standard perturbation theory.

The error equations for the instrument strings include all contributions from sensor input to signal processing output (trip). The error calculations for the individual modules include a term for errors due to the tolerances for monthly calibration in accordance with vendor-supplied calibration instruc-tions. The equipment errors were determined as shown below.

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l The errors were calculated for three plant conditions: reference (ideal),

l abnormal (design range), and accident. The abnormal condition simulate's the worst-case, non-accident equipment environment during plant operation.

I Digital devices are assumed to add no additional error. Where the error of a device is input-dependent, the calculations reflect the value of the input which results in maximum error. Gain settings can be set to actual gain ,

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settings or to gain settings that produce maximum error. For this report, ac-tual gain settings were used. The assumptions and definitions of conditions used in the error analyses are given in Table 1.

Table 1. Assumptions and Definitions of Conditions Used in Instrumentation Error Analysis i

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4. HDDULE AND STRING ACCURACIES Table 2 compares current and revised values of individual module accuracies.

The revised accuracies for each individual string are also given. For the flow portion of the power / imbalance / flow trip the accuracies are provided for three pump configurations at reference, abnormal, and accident conditions.

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Table 2. Revised and Current, Module Errors and Revised l String Errors for RPS l I

String Revised Current NI/RPS HI Temp Trip (1) RTD 171 EW (2) Signal converter

, (3) Bistable (w/ int SP)

(4) Reactor trip module  !

Abnormal condition string error =

, NI/RPS HI and LO Pressure Trip (1) 1152GP pressure transmitter (2) Buffer ampi (3) Bistable (w/ int SP)

(4) Reactor trip module Abnormal condition string error =

NI/RPS Variable LO Pressure Trip .-

(1) RTD 177 HW (2) Signal converter (3) 1152GP pressure transmitter i (4) Buffer ampi (5) Bistable (6) Reactor trip module Abnormal condition string error =

HI Reactor Building Pressure Trip (1) Marcoid pressure switch (2) Contact buffer (3) Reactor trip module Abnormal condition string error =

, NI/RPS Overpower Trip (0) UCIC (1) Linear ampi (2) Sum / difference ampi (3) Bistable (4) Reactor trip module Abnormal condition string error =

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+-- = _ . . - . . . . - . - - , . - ., _ _ - . . . - . . _ _ . - . - - , . - , _

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- . - . - _ . - - ---.-r,-- - - - - - , . - r - - - - - .-

Table 2 (Cont'd)

String Revised Current

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NI/RPS Power / Pumps Trip (0) UCIC (1) Linear ampl i (2) Sun / difference ampi l (3) Contact monitor j (4) Bistable (5) Reactor trip module Abnormal condition string error =

NI/RPS Power-Imbalance-Flow Trip

• Power, 4 (0) UCIC (1) Linear ampl )

(2) Sum / difference ampi (3) Bistable (4) Reactor trip module Abnormal condition string error =

_ Imbalance, M (0) UCIC (1) Linear ampi (2) Difference ampi (3) Sum / difference ampi (4) Function generator (a)

(5) Bistable (a)

(6) Reactor trip module (*}

Abnormal condition string error = -

Flow, F (1) dP BY transmitter (2) Square root extractor (3) Buffer amp 1 Abnormal condition string error =

(2/1 pump operating condition)

Table of Flow Errors (2/2 pump)

(2/1 pump)

(1/1 Pump)

• }Not included in error.

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5. CALCU'ATION OF FLOW STRING ERROR -

Flow error is dependent on changes in AP and varies for different combina-tions of pump operation. The flow error is calculated by determining the appropriate flow and AP in each loop for a given combination of pumps operat-ing and then computing the output error of the square root extractor module (see Figure 8). The output error of the square root extractor is then com-bined with the pump operating data and AP data to calculate the output error of the buffer amplifier. The buffer amplifier output error is the flow string error. Of the different flow transients, the one-pump coastdown is limiting for Crystal River 3. Therefore, the 2/1 pump combination was chosen to calculate the error that is used in the flux / flow setpoint calculations.

Errors for each instrument string are calculated for reference, abnormal, and accident conditions. The abnormar r andition is conservative for the type of environment in which the instrumentation will be required, and the errors calculated for this condition are used in the setpoint analysis. Table 3 shows how the flow component error and time delay of the power / imbalance /

flow trip are computed.

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Table 3. Flow String Error and Delay Time Calculations for the 2/1 RC Pump Configuration - Abnormal Condition Module Data for Buffer Amplifier, Square Root Extractor, and dP Transmitter e.

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Table 3 (Cont'd) m 5-3 Babcock s,Wilcox

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6. FLUX / FLOW SETPOINT CALCULATION The flux / flow trip setpoint df the RPS provides protection for less-of-flow transients at rated power and provides overpower protection whenever the plant

. is being operated with less than four reactor coolant (RC) pumps running.

The flux / flow setpoint is deterinined from the following equation: .

The unadjusted flux / flow setpoint (S ,) is first determined by a thermal-hy-draulic analysis of the limiting flow coastdown transient at the limiting peak initial power level.

S,is determined so that DNB shall be precluded for the most limiting RC pump coastdown event. Once S,is determined and the flow error and noise are known, then the adjusted flux / flow setpoint may be calculated. .

The parameters used in the latest setpoint calculation for Crystal River 3 are given below.

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These inputs result in a setpoint of The trip delay time used in the calculation of S,was 6-2 Babcock a.Wilcox

. 7. SUMARY AND CONCLUSIONS The previous sections of this report showed the detailed error calculatt..;s for.the flow instrumentation string and the impact of this error on one of

.the plant setpoints. Since the flow and histable errors,are both relatively large, the impact on the flux / flow setpoint can be substantial. The effects on the other setpoints are similar although not to the same extent. The Tech-nical Specifications that were transmitted to Florida Power Corporation on June 29, 1981 (FPL 81-074) include the effects of all the revised RPS instru-ment errors.

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8. REFERENCES Table 4 is a list of the references used to accumulate error dcca for the specific modules; Table 5 is a correlation of references to the modules.

Table 4. References (1) 81-0057-02 EATF (10/09/78)

(2) 81-0057-05 EATF (03/13/79)

(3) 32-1103170-04 NI/RPS and ESFAS String Error and Time Response Methodology (03/07/81)

(4) 58-0086-05 880 Nuclear Instrumentation Qualification Test Report - Addendum 7 (5035) (10/02/80)

(5) 58-0085-00 880 Nuclear Instrumentation Qualification Test Report (5035) (07/16/76)

(6) 58-C086-03 Addendum to Nuclear Instrumentation Qualification Test Report (03/20/80)

(7) SCR-001 Safety Concern Report (05/03/78)

(8) 58-0080-00 BCCo Report APW-7041-153, Marcoid Pressure Switch

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(9) 58-0081-00 Type last Report of BCCo BY Differential Pressure Tran==ftcer (03/12/73)

(10) 4110, 4125 Rosemount Instruction Manuals (October 1974)

.(11) E92-315-1971 System 880 Linear Amplifier Product' Instruction (1971)

(12) E92-316-1970 System 880 Buffer Amplifier Product Instruction ,

(1970) j (13) 58-0146-00 880 Temperature Channel Report (5039) (07/16/76)

(14) E92-317-1971 System 880 c/A Amplifier Product Instruction (1971)

(15) E92-341-1969 System 880 Bistable Product Instruction (1%9) 8-1 Babcock & Wilcox

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(16) E92-345-1971 System 880 Square Root Extractor Product Instruc-tion (1971) *

(17) E92-346-1971 System 883 Signal Converter Product Instruction (1971) ,

(18) E92-358-1.971 System 880 '/ unction Generator Product Instruction (1971) .

. (19) 58-0095-00 880 Linear Amplifier Report (5035 Addendum 2)

(20) S0-S-1700K334 Duke Power Co. S.O. for Marcoid Pressure Switch (21) E92-371-1971 System 881 Contact Buffer Product Instruction (1971)

(22) NI/RPS Spare Parts (list) Identifier Matrix (Task 23)

(03/10/79)

(23) RC System SparePartsIdentifierMatrb(Task 22) (02/06/79)

(24) 01-0037-01 CR Unit 3 NI/RPS Instruction Books (25) 86-1118054-03 CR III. Cycle 3 Technical Specifications (07/16/80)

(26) STR 066 RC Flow and Flow Coastdown Data (01/09/77)

(27) 58-0096-00 880 Reactor Trip Module Report (BCCo Report 2431)

(07/16/76) -

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. ,. . 1 Table 5. Correlation of References to Modules Module Reference Bistable 58-0086-05 l Buffer amplifier . SCR-001 BY transmitter 58-0081-00 Contact bu(fer R92-371-1971 ,

Contact monitor 58-0085-00 Difference amplifier 58-0086-03 ,,

Function generator SCR-001 Linear amplifier 81-0057-05 Marcoid pressure switch 58-0080-00 BC pump data STR-066 Reactor trip module 58-0096-00 Rosemount 1152GP , 81-0057-05 177GY RTD and bridge 81-0057-05 Signal converter 58-0146-00 Square root extractor 81-0057-02 Stan/diff amrilifier SCR-001 + ,,

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O e ATTACHMENT B CRYSTAL RIVER UNIT 3 RPS INSTRUMENT ACCURACIES B&W PROPRIETARY

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Babcock &Wilcox AFFIDAVIT OF JAMES H. TAYLOR ,

A. My name is James H. Taylor. I am Manager of Licensing in the Nuclear Power Generation Division of Babcock &, Wilcox, and as such I am authorized to execute this Affidavi.t.

B. I am familiar with-the criteria app', icd-by Babcock & Wilcox to de-termine whether certain information of' Babcock & Wilcox is proprietary and I am familiar with the procedures established within Babcock & Wilcox, particularly the Nuclear Power Generation Division (NPGD), to ensure the proper application of these criteria.

C. In determining whether a Babcock & Wilcox document is to be classi-fied as proprietary information, an initial determination is made by the unit manager who is responsible for originating the document as to whether it falls within the criteria set forth in Paragraph D ,

hereof. If the information falls within any one of these criteria, it is classified as proprietary by -the originating unit manager.

This initial determination is reviewed by the cognizant section manager. If the document is designated as proprietary, it is re-viewed again by Licensing personnel and other management within NPGD as designated by the Manager of Licensing to assure that the ,

regulatory requirements of 10 CFR Section 2.790 are mat.

D. The following information is provided to demonstrat['that the pro-

'i visions of 10 CFR Section 2.790 of the Commissions regulations ,

have been considered. ,

(i) The information has been held in confidence by the. Babcock &

Wilcox Company. Copies of the document are clearly identified as proprietary. In addition', wheneber Babcock & Wilcox transmits the information to a cus' tonier, customer's agent, potential customer or regulatory agency, the transmittal-re ,

quests the recipient to hold .the information as 'proprietarp.' >

Also, in order to strictly limit any. potential or actual' '

customer's use of proprietary inforpation, the following i )

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Babcoch&Wilcox AFFIDAVIT OF JAMES H. TAYLOR (Cont'd) i .

4 provision is included in all proposals submitted by Babcock r' & Wilcox, and an applicable version of the proprietary provision is included in all of Babcock & Wilcox's contracts:

4 j " Purchaser may retain Company's Proposal for use in connection with any contract resulting therefrom, and, for that purpose, make such copies thereof as may be necessary. Any proprietary information concerning Company's or its Suppliers' products or manufacturing

, processes which is so designated by Company or its Suppliers and disclosed to Purchaser incident to the

, performance of such contract shall remain the property

, of Company or its Suppliers and is disclosed in confi-dence, and Purchaser shall not publish or otherwise disclose it to others without the written approval of Comppny, and no rights, implied or otherwise, are granted to produce or have produced any products or to practice or cause to be practiced any manufacturing processes covered thereby.

Notwithstanding the above, Purchaser may provide the NRC or any other regulatory agency with any such pro-prietary information as the NRC or such other agency may require; provided, however, that Purchaser shall first give Company written notice of such proposed

, s disclosure and Company shall have the right to amend such proprietary information so as to make it non-pro-prietary. In the event that Company cannot amend such proprietary information, Purchaser shall, prior to disclosing such information, use its best efforts I' to obtain a commitment from NRC or such other agency

' \ ,. to have such infor: ration withheld froa public inspection.

n (2) c

Babcock &Wilcox AFFIDAVIT OF JAMES !i. TAYLOR (Cont'd)

I Company shall be given the right to participate in pursuit of such confidential treatment."

(ii) The following criteria are customarily applied by Babcock &

Wilcox in a rational decision process to determine whether the information should be cla'ssified as proprietary. Information may be classified as proprietary if one or more of the following criteria are met.

a. Information reveals cost or price information, commercial strategies, production capabilities, or budget levels of Babcock & Wilcox, its customers or suppliers.

b. The information reveals data or material concerning Babcock

& Wilcox research or development plans or programs of present or potential competitive advantage to Babcock &

Wilcox.

c. The use of the information by a competitor would decrease his expenditures, in time or resources, in designing, producing or marketing a similar product.

d. The information consists of test data or other similar data concerning a process, method or component, the application or which results in a competitive advantage to Babcock &

Wilcox.

e. The information reveals special aspects of a process, method, component or the like, the exclusive use of which results.in a competitive advantage to Babcock & Wilcox.

f. The information contains ideas for which patent protection may be sought.

(3)

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Babcock &Wilcox AFFIDAVIT OF JAMES H. TAYLOR (Cont'd)

The document (s) listed on Exhibit "A", which is attached hereto and made a part hereof, has been evaluated in accordance with normal Babcock & Wilcox procedures with respect to classification and has been found to contain information which falls within one or more of the criteria enumerated above. Exhibi t "B", which is attached hereto and made a part hereof, specifically identifies the criteria applicable to the document (s) listed in Exhibit "A".

(iii) The document (s) listed in Exhibit "A", which has been made avail-able to the United States Nuclear Regulatory Commission was made available in confidence with a request that the document (s) and the information contained therein be withheld from public disclosure.

(iv) The information is not available in the open literature and to the best of our knowledge is not known by Combustion Engineering, EXXON, General Electric, Westinghouse or other current or potential domestic or foreign competitors of B&W.

(v) Specific information with regard to whether public disclosure of the information is likely to cause harm to the competitive position of Babcock & Wilcox, taking into account the value of the information to Babcock & Wilcox; the amount of effort or money expended by Babcock & Wilcox developing the information; and the ease or difficulty with which the information could be properly duplicated by others is given in Exhibit "B".

E. I have personally reviewed the document (s) listed on Exhibit "A" and have found that it is considered proprietary by Babcock & Wilcox because it contains information which falls within one or more of

.the criteria enumerated in Paragraoh D, and it is information which is customarily held in confidence and protected as proprietary in-formation by Babcock & Wilcox. This report comprises information utilized by Babcock & Wilcox in its business which afford Babcock

& Wilcox an opportunity to obtain a competitive advantage over (4)

. s Babcock &Wilcox those who may wish to know or use the information contained in the document (s).

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[ JAMES $.'TAYLOIk State of Virginia)

City of Lynchburg James H. Taylor, being duly sworn, on his oath deposes and says that he is the person who subscribed his name to the foregoing state-ment, and that the matters and facts set forth in the statement are true.

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[ JAMES'H. TAYLdR Subscribed and sworn before.me this ' d ay o f ". - TA 19 82.

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Notary Public in and for the City of Lynchburg, State of Virginia

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My Commission Expires W d I l i '4

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