ML20054G338
| ML20054G338 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 06/16/1982 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM LQA8200155, NUDOCS 8206210458 | |
| Download: ML20054G338 (4) | |
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GENERAL OFFICE P O BOX 499. COLUMBUS. NEDRASKA 68601-0499 Nebraska Public Power D*istrict memoNe <40a se4.ese,
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LOA 8200155 June 16, 1982 U.S. Nuclear Regulatory Commission Attention:
Mr. Domenic B. Vassallo, Chief Operating Reactors Branch No. 2 Division of Licensing Washington, DC 20555 Subj ec t :
NUREG-0737, Items II.F.1.4, 5, and 6
" Containment Pressure, Level, and Hydrogen"
Dear Mr. Vassallo:
Your letter of May 17, 1982 requested confirmation that information contained in a phone conversation record was correct. The information which is circled in the attached record has been reviewed by the D is t ric t. The remaining information was provided by the contractor and has not been verified.
Corrections should be made as follows:
Item A1:
The "second monitor" has a dual range of 0-20% and 0-10%.
Item A2 and A4:
Our technical manuals identify sensitivies and accuracies as a percentage of input span and not as a standard deviation as indicated by the contractor.
Item A4:
The torus transmitter has a range of 0-30 ft.
Item A5:
There is one hydrogen sample port in the torus.
Item A7:
The Beckman Instruction Manual gives an accuracy of "1 2% of full scale" and the Bendix Operation and Service Manual gives an accuracy of "f 1% of range".
OY E206210458 820616 FDR ADOCK 05000298
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Mr. Domenic B. Vasca11o June 16, 1982 Page 2 If you have any questions concerning this information, please contact my office.
Sincerely, M
Jay M. Pilant Division Manager of Licensing and Quality Assurance JMP:JDW:cmk Attachment
PHO'iE CC.9'r p.S ATI0ft 24-26 MAR 82_
COOPER flote: See Appendix for definitions and abbreviations.
Ql.
The review we are discussing is the Containment Systems Branch (CSB)
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part of the total review discussed in tiUREG-0737.
The CSB review con-sists of all ites.s discussed under " Position" and
- Clarification" ex-cept the review of compliance to the Appendix' B criteria, and the review of the measurement system completion date.f.* In the submittals we received to date, you have not indicated that you plan to take exception to any of the fiUREG-0737 criteria in our area of review.
Are you planning any ex-
' ceptions in our area of review of which we are not aware.
A1.
There is just one item which we don't regard as an exception,of any im-tiUREr _0737,Je4Uires hat the 'drogen monitors have a range of 0
portance.
Ot to 10t.
Cooper has one monitor with a range of 0% to 5% and the second
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m or has a range of o
Q2.
What is the accuracy of your pressure monitor? State this for both the indicator and the recorder.
A2. &.
There is only cne readout device
.the recorder,.which also serves as an-indicator.
There are tWo pressure monitors, the low range which extends fr0m -5 psig to +5 psig, and the high range which extends from 0 psig to 250 psig.
s Both systems have the same uncertainty.
Transmitter 50 = 0.5%.
Recorder SD 0.25%.
=
Sys t em S D = RS S ( 0. 5%, 0.2 5% ) = 0. 55%.
Q3.
What is the time response of your pressure monitor? State this for both the indicator and the recorder.
A3./ The transmitter goes from Ir% to 90% output in 180 milliseconds on.aWJ I
s
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% function input Assume a first order transfer function exp(-tj/TTC) = 0.9 t /TTC = 2.3'02 exp(-t /TTC) = 0.1 t /TCC = 0.105 1
2 2
at = t -tj = 0.18 sec. = (2.302 - 0.105)* TTC Transmitter Time Constant =
2 TTC = 0.08 sec.
W The Recorder goes from 10% to 90% in 3 sec.
or 0% to 63% in 2.4 sec.
u
- The environmental qualification and request for schedular relief for II.F.1.4, II.F.1.5, and II.F.1.6 will be dealt with separately.
PH0!iE CONVERSATION 24-26 MAR 82 C00?ER Q4. What is the accuracy of your water' level 6onitor? State this for both the wide range instrument and the n' arrow range instrument.
We have separate water level monitors for the torus and the drywell. ~
On each system there is only one readout device, the recorder, which al " serves as an indicator.
...- uncertainties in these systems are as follows:
Drywell Transmitter 50 = 0.5%.
Recorder SD = 0.25%
Torus Transmitter 50 = I g [ Rana Q ft. - 20 ft.]
Drywell System 50 = RSS (0.5%, 0.25%) = O Torus System SD = RSS (1-0%, 0.25%) = 1.03%
Q5. Where are the hydrogen sample ports, placed?
n5.
There are three hydrogen sample ports on the drywell at elevations 13 feet, 43 feet, and 78 he bottom of the dr ell and tw pI ports in the torus.
Is there any obstruction which would prevent hydrogen, esc'apin'g from the core, Q6.
from reaching the hydrogen sample ports quickly?
A6.
Q7. What is the accuracy of your hydrogen monitor?
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A7. Both hydrogen monitors have only one readout device; the recorder, which also serves as an indicator.
The hydrogen monitors come as units with total uncertainty 'specified for the whole unit.
Beckman Manitor:
Range 0% - 20%, Accuracy 5%
7 Bendix Monitor:
Rang e 0% -
5%, Accuracy 2%
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