ML20138J242
| ML20138J242 | |
| Person / Time | |
|---|---|
| Issue date: | 01/28/1997 |
| From: | Wang E NRC (Affiliation Not Assigned) |
| To: | Matthews D NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9702060077 | |
| Download: ML20138J242 (38) | |
Text
.
January 28, 1997 MEMORANDUM TO: David B. Matthews, Chief Generic Issues and Environmental Projects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation FROM: Egu Y. Wang, Reactor System Engineer Original Signed By:
Generic Issues and Environmental Pr0jects Branch Division of Reactor Program Management Office of Nuclear Reactor Regulation
SUBJECT:
MEETING
SUMMARY
OF JANUARY 24, 1997, REGARDING CALDON'S THERMAL POWER UPRATE PROGRAM On January 24, 1997, representatives of Caldon Inc. met with representatives of the Nuclear Regulatory Commission (NRC). Participants also included representatives from Corey-Regan, Inc., Winston & Strawn, Texas Utilities Electric, Niagara Mohawk Power Corp., Arizona Public Service Co., Northern States Power Co., Southern Nuclear Operating Co., and Tennessee Valley Authority. The purpose of this meeting was to provide an opportunity for Caldon representatives to brief and discuss issues with regard to the effects of improvements in flow and temperature measurements to a reactor licensee's thermal power uprate program.
Mr. Cal Hastings, President & CEO, Caldon-Inc. provided an introduction on both the company and measurement improvement program and schedule information.
Mr. Hastings stated that a topical report would be submitted within a month.
Mr. Herb Estrada, Chief Engineer, Caldon Inc., discussed some keypoints and technical issues about this program. He also stated that six licensees had expressed interest in implementing the improvements as part of their thermal power uprate programs.
Two actions were identified this meeting. First, NRC is to have an internal meeting to discuss potential legal, policy, or technical issues raised by this program. Second, another meeting between Caldon and NRC will be scheduled, if necessary, to address any outstanding' issues based on internal NRC discussion.
Attachment 1 provides a list of meeting attendees. Attachment 2 is the presentation material.
Attachments: As stated cc w/att: See next page DISTRIBUTION:
See attached page '
Document name: 970124MT. SUM
- See previous concurrence
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Mr. Ernest M. Hauser, Sale Manager l Caldon Inc.
2857 banksville Road Pittsburgh, PA 15216 4
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. 1 NRC/SIENENS POWER CORPORATION NEETING ON CONTROL R00 INSERTION ISSUES I LIST OF ATTENDEES l January 24, 1997 l
N8ME ORGANIZATION Hastings, Cal Caldon !
Estrada, Herb Caldon i Hauser, Ernie Caldon i Cowan, Barton Eckert Seamans Cherin & Mellott '
Wiesemann, R. A. Eckert Seamans Cherin & Mellott Philips, Malicom Winston & Strawn Horin, Bill Winston & Strawn Berte, F. J. Tetra Engineering Group Regan, Jennifer Corey-Regan/Caldon Edison, Mike Southern Nuclear Operating Co.
Krainik, Angela Arizona Public Service Co. ;
Walker, Roger Texas Utilities Electric l Contard, Chris Niagara Mohawk Power Corp. '
Drake, R. V. Tennessee Valley Authority l Verbout, Thomas Northern States Power Co. I Thadani, Ashok NRC/NRR !
Malsch, Martin NRC/0GC 4 Boger, Bruce NRC/NRR/DRCH Mauck, Jerry l NRC/NRR/DRCH/HICB :
Doutt, Cliff NRC/NRR/DRCH/HICB l Golub, Geoffrey NRC/NRR/DSSA/SRXB Balukjian, Harry l NRC/NRR/DSSA/SRXB Matthews, David NRC/NRR/DRPM/PGEB
, Wang, Egan NRC/NRR/DRPM/PGEB L
4 l
I ATTACHMENT 1 l
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- conducted over 170 hydraulic model tests at Alden Research Laboratory Intro 5
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Agenda
- 1. Overview - Purpose of uprate program Current measurement practices and outcomes Improved measurement approach and outcomes
- 2. LEFM Technology
- Description of system and components
- Field experience a Basis for uprate
- 3. Topical Report
- Structure and approach
- 4. NRC Submittal &
- Define Process Review Process
- Estimate Schedule
- Discussion BAL-3898.02
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Overview LEFM Benefits
=
improve accuracy of thermal power measurements Verify accuracy on-line
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Reduce probability of overpower operation Increase licensed power level with improved safety margin i
l BAL-3898.03 I
w6 m t=,m Overview Calculation of Thermal Power
_ Steam Flow,Ws e- -
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Feedwater Energy Content, hm Thermal Power = WFw (hs - hF w ) + cycle gains & losses l l Feed Flow Feed Temperature '
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BAL-3898.04
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Overview Venturi Nozzle Converts analog pressure and temperature measurements to digital Resistance >T65P thermometer =
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electricalcurrent converter jg e x 's Differential Temperature y pressure signal f
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Overview LEFM Makes direct digital measurements of flow and temperature from transit times s
Row s direction " 's s
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L Mass flow and temperature signals A]
Converts transit time of ultrasonic pulse to Cs mass flow and temperature s
's-Plant computer '
BAL-3898.06
K 1 Overview Calculated Thermal Power Uncertainties Typical 2 Loop LEFMEd Venturi nozzle Total uncertainty (2-sigma,95%) .60% 1.40%
instrumentation contribution .41 % 1.30 %
l BAL-3898.07
i OO D M O 1 ImiW LEFM Technology .
Distribution of Flow Nozzle Measurements vs. LEFM l 101 Flow nozzles Nozzle less than LEFM Mean Nozzle more than LEFM
- 28 Chordal and ,
24 external LEFM's l 22 i Differences are W20 normally distributed i18 i except for known $16 4
nozzle failures j,'2 Data consistent with ;10
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nozzle accuracies e6 4
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-3.5-3.0-2.5-2.0-1.5-1.0-0.50 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Percent riifference ((nozzle - LERA)/ nozzle)
BAL-3898.08
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LEFM 7 Technology Spoolpiece with Transducers Geometry of a time-of-flight acoustic path
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"^* 5 "^* tt as y PATH C=hIAB+t BA C = sound velocity of fluid at rest BAL-3898.11
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Spoolpiece with Transducers Four chordal paths measure transit times of ultrasonic pulses X Y2 Y3 ;
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BAL-3898.12
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LEFM 7 Technology improved Water Temperature Measurement Based on sound velocity correlation - - -10mm -
- Accuracy better than " " -
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temperature over pipe E ' N cross-section j g i %
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60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 Temperature (*F)
BAL-3898.13
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CO O ND LEFM 7 Technology i
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.. Feedwater Mass _ Feedwater Density
, Flow computation Computation I
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i' External Test Local Dight Dam Local Data 9 Modem Port Display t9 M der l
Plant computer calculates thermal power, displays system status '
BAL-3898.14 9
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LEFM Availability
- Availability 99.6%
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- Based on field data from 1978-1997 l
800,000 operating hours t
BAL-3898.15
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- Path lengths Hydraulic profile g = Clock precision
- Circuit self-checks
- Signalstrength
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- Non-fluid time delays
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- Communication link with plant computer 3
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= Thermalpowerdisplay Verification display s____
BAL-3898.16 4
r ;u wcr4 Sustained Overpower Events Reported in LER's (1981-1997)
Preventable with On-line Verification
. @ Preventable with on-line verification m
isa g Feed ficw or temperature-related M
instrument error
@ Feed flow or temperature-related
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$ Other core thermal power error or y failure of otherinstruments n
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E1 Overview Calculated Thermal Power Uncertainties Typical 2 Loop LEFML2 Venturi nozzle Total uncertainty (2-sigma,95%) .60% 1.40%
Instrumentation contribution .41% 1.30 %
BAL-3898.18
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Margin improvement Thermal Power Uncertainties Venturi
- of std. noz.?le LEFM Probability Odds of exceeding deviations bounds bounds within bounds bounds on high side 1.0 0.7% 0.3% 68% 1/6.3 2.0 1.4% 0.6% 95.4 % 1/44 3.0 2.1% 0.9% 99.7 % 1/741 4.0 2.8% 1.2% 99.994 % 1/32,300 5.0 3.5% 1.5% 99.99994 % 1/3.3 million BAL-3398.19
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1 Overview 1
Overpower Probability LEFMZwith 1% uprate i 6.3 1 3 44 i
, 1 Current 740 licensed 1 power rating 32,300 I
I 1 3,300,000 m i i 1.000 1.010 1.020 1.030 1
- 3,300,000 1
32,300 1
t 740 1
1 44 i
-1 E5 Current instrumentation -
BAL-389820 ,
- Q_
E $$$ .
Margin improvement 0.025
- 0.020 \\l Currentinstrumentation s LEFM Zwith 1% uprate g
i 3 0.015 '
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$ 0.010 I
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$ 0.005
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0.000 I I I I l I I I I l l l l l4J_ m i l l _l l l 100.5 101.0 101.5 102.0 102.5 103.0 Power (percent of currentlicense)
BAL-3898.21
s id jBliN !
Conclusion LEFM Benefits verify accuracy ,.,
on-line Improve accuracy lw ^ >l ;
3.a of thermal power Analyzed powerlevel measurements 1.02 i Reduce probability U atelicensed i of overpower i.oi power iev operation i Currentlicensed !
Increase licensed 1.00 powerievei power level with improved margin Using current Proposed uprate instrumentation using LEFM i
~
BAL-3898.22 -
c2uiiining -
Conclusion t
l l
Improve plant safety Licensees are interested in:
- uprate l
-improvement in calorimetric design basis
- on-line verification Narrowly focused scope I !
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1 L l
l BAL-3898.23 l
c-Topical Report Outline
- 1. Purpose and scope 2.
Background, calorimetric determination of thermal power
- 4. Current calorimetric power determinations 5.
Basis for the thermal power uprate with the LEFM
- 6. On-line verification of LEFM accuracy
- 7. LEFM reliability 8.
Conditions for use of LEFM uprate
- 9. References s&unu b
b
_ . _ _ _ . - - - - - - - ~
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Topical Report Outline
- 10. Appendices A. Basis for uncertainties in existing calorimetric instrumentation B. Principles of chordal LEFM flow and temperature measurements C. Verification of LEFM temperature correlation D. Identifying and bounding the uncertainties in LEFM flow and i temperature measurements E. Basis for uncertainties in determining thermal power with the LEFM l F. Survey of LEFM hydraulic performance l G. Estimates of the probability of exceeding power margins of up to 5 l standard deviations l H. Caldon flow measurement applications 1
l
( BAL-3398.25 i
am Request for Review and Approval
- Increased LEFM Z accuracy and increased safety margin
- Use as technical basis by licensees for uprates up to 1%
Under 10CFR50.46('aX1Xi) i e
-1
c l
l
- DISTRIBUTION
- Mtg. Sunnary of January 24, Meeting with Caldon Inc.
l Dated January 28. 1997 HARD COPY
- Central File Public PGEB r/f R. Cooper, RI E. Merschoff, RII W. Alexion, RIII J. Dyer, RIV E. Wang OGC ACRS E-MAIL F. Miraglia A. Thadani R. Zinnerman T. Martin E. Jordan B. Boger D. Matthews F. Akstulewicz J. Weimiel M. Malsch C. Doutt J. Mauck H. Balukjian G. Golub l
l 7 7-M NRC HLE CENTER CO '
CGG013