ML19347F321
| ML19347F321 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 05/12/1981 |
| From: | Bayne J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19347F322 | List: |
| References | |
| JPN-81-34, NUDOCS 8105180377 | |
| Download: ML19347F321 (8) | |
Text
,
POWER AUTHORITY OF THE STATE OF NEW YORK to COLUMaus CIRCLE NEW YORK. N. Y. too19 (212) 397 6200
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E Director of Nuclear Reactor Regulation um U.S. Nuclear Regulatory Commission Washington, D.C.
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5 Attention:
Mr. Thomas A. Ippolito, Chief
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Operating Reactors Branch No. 2 Division of Licensing fj t,Mf t,
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Subject:
James A.
FitzPatrick Nuclear Power Plant Y
Docket No. 50-333 Additional Information Regarding Containment \\[k',/'h8
Purging and Venting During Normal Operation.
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References:
- 1. NRC letter, T.A.
Ippolito to G.T. Berry -
dated July 18, 1980.
- 2. PASNY letter, J.P. Bayne to T.A.
Ippolito -
(JPN-81-7) dated January 9, 1981.
Dear Sir:
Submitted herein (Attachment 1) are responses to the NRC questions in Enclosure 2 of Reference 1.
Responses to NRC questions in Enclosure 1 of Reference 1 were previously transmitted to you via reference 2.
l We trust that the information provided herein satisfies your con-l cerns.
Should you have any questions regarding this matter, please l
do not hesitate to contact us.
bY O
Very truly yours, il 3
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(J.P.
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M enior Vi e President 3(
Nuclear Generation enCs.
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ATTACHMENT 1 REQUEST FOR ADDITIONAL INFORMATION JAMES A. FITZPATRICK NUCLEAR POWER PLANT CONTAINMENT PURGING DURING NORMAL PLANT OPERATIONS MECHANICAL OPERABILITY DEMONSTRATION Question 1.
Provide the following information for the Purge / Vent System butterfly valves that are under review..
Inside/Outside Serial Size Containment Manufacturer Part Number Number Serial Operator Unit Type Manufacturer Part Number Number Serial Solenoid Valve Type Manufacturer Part Number Number
Response
Inside/Outside Size Containment Manufacturer Part No.
Serial No.
24" Outside Fisher 9222 5091711 24" Outside Fisher 9222 5091712 24" OUtside Fisher 9222 5091713 24" Outside Fisher 9222 5091714 20" Outside Fisher 9222 5091715 20" Outside Fisher 9222 5091716 20" Outside Fisher.
9222 5091717 20" Outside Fisher 9222 5091718 -.
Operator Unit Type Pneumatic Cylinder-Air to open; Bettis 733C-SR80 BF171050 spring to close Pneumatic Cylinder-Air to open; Bettis 733C-SR80 BF171051 spring to close Pneumatic Cylinder-Air to open; Bettis 733C-SR80 BF171052 spring to close Pneumatic Cylinder-Air to open; Bettis 733C-SR80 BF171053 spring to clo 3 Pneumatic Cyliner-Air to open; Bettis 732C-SR80 BF171054 spring to close Pneumatic Cylinder-Air to open; Bettis 732C-SR80 BF171055 spring to close Pneumatic Cylinder-Air to open; Bettis 732C-SR80 BF171056 spring to close Pneumatic Cylinder-Air to open; Bettis 732C-SR80 BF171057 spring to close Solenoid valve Type Manufacturer Part No.
Serial No.
3-way ASCO HT-831655 01237S 3-way ASCO HT-831655 87895A 3-way ASCO HT-831655 87895A 3-way ASCO HT-831655 87895A 3-way ASCO HT-831655 87895A 3-way ASCO HT-331655 01237S 3-way ASCO HT-831655 87895A 3-way ASCO HT-831655 05073S Question 2.
Provide schematics of the valve assembly air circuits showing solenoid valve (s), regulators, pressure switches, etc.
Response
The schematic of instrument air supply to the containment vent and purge butterfly valves is shown on the following drawings (enclosed)
Drawing No.
Description 12966.75-SK1 Instrument air connection schematic 11825-FK-1B-10 Instrument Piping Reactor Bldg.-Sht.2 11825-FK-lF-10 Instrument Piping Reactor Bldg.-Sht.6 ll825-FK-lH-7 Instrument Piping Reactor Bldg.-Sht.8 All solenoid valves for instrument air supply to the containment vent and purge valves are mounted on these valves and are wired such that they are required to be " energized" to open the valve.
Also, all
these valves require " Instrument Air to Open".
Therefore, on " loss of instrument air" to the valve or " loss of electric power" to the solenoid valve will cause all containment vent and purge valves to go " full closed".
Question 3.
Has each of the butterfly valve assemblies been reviewed to assure that the basis for qualification has been established for each valve assembly, based on the following:
a.
Valve designs may differ b.
Valve assemblies may differ, i.e., different operator / valve combinations used.
Response
The subject valves include two different assemblies. These are 24" 9222 with Bettis 733-SR actuators and 20" 9222 with Bettis 732-SR actuators.
The basis for qualification was established for both groups by the supplier, Fisher Controls, Inc.. Seismic analysis was done for each group.
Environmental qualifications would be the same for both groups.
Question 4.
Were the dynamic torque coefficients used for the determination of torques developed, based on data resulting from actual flow tests conducted on the particular disc shape / design / size?
What was the basis used to predict torques developed in valve sizes different (especially larger valves) than the sizes known to have undergone flow tests.
Response
No flow tests were
?rformed for 20" and 24" valves of the 9222 Design.
Tests were performed on other valves of similar design.
Using data from these tests, torques for the 20" and 24" 9222 were predicted based on:
Diameter of Disc The aspect r f the disc (Defined as the ratio of Thickness of Disc).
Frictional forces based on size and material of the shaft and of the bushings.
Seating forces based on seating area and material.
Question 4.
Were installation effects accounted for in the determination of dynamic torques developed?
Dynamic torques are known to be affected for example, by the flow direction through valves with off-set discs, by downstream piping backpressure, by shaft orientation, relative to elbows, etc.
I What was the basis (test data or other) used to predict dynamic torques'for the particular valve installation?
Response
Fisher's dynamic torque predictions are based on uniform flow profiles.
Installation effects were not addressed in the determ-ination of dynamic torque of the subject valve.
However, based on valve industry testing, the effect of valve shaft orientation relative to elbows on dynamic torque is considered negligible.The subject valves at the FitzPatrick Plant do not have off-set discs.
For the accident conditions, the sizing delta-P of the valve was taken to be equal to the peak accident containment pressure.
No credit is taken for any l
.. b:ck-proccura which may cxict in tha downstream piping.
This 10 a conservative approach if a back-pressure does exist.
Question 6.
What code, standards, or other criteria was the valve designed to?
What are the stress allowables (tension, sheer, torsion, etc.)
used for critical elements such as discs, pins shaft yoke, etc. in the valve assembly.
Response
The subject valves were designed according to the require-ments of the ASME Boiler and Pressure Vessel Code,Section III and ANSI B16.5.
Allowable stresses were taken from the ASME Boiler and Pressure Vessel Code.
Question 7.
Where air operated valve assemblies used accumu-lators as the fail-safe feature, describe the accumulator air system configuration and its operation.
Provide necessary information to show the adequacy of the accumulator to stroke the valve i.e.,
sizing and operation starting from lower limits of initial air pressure charge.
Discuss active electrical components in the accumulator system, and the basis used to determine their qualification for the environmental conditions experienced.
Is the accumulator system seismically designed?
Response
The subject valves at the FitzPatrick Plant do not utilize air accumulators..The val,ves are designed to fail in the closed position being closed by spring force, upon loss of air supply to the operator.
Question 8.
For valve assemblies requiring a seal pressurization system (inflatable main seal) describe the air pressuritation system configuration and operation including means used to determine that valve closure and seal pressurization have taken place.
Discuss active electrical components in this system, and the basis used to determine i
their qualification for the environmental condition expcrienced.
Is this system seismically designed?
1 For tnis valve, has it been determined that the " valve travel stops" (closed position) are capable of withstanding the loads imposed at closure during the DBA-LOCA conditions?
Response
Neither seal pressurization nor closed position travel stops are used on the subject valves at the FitzPatrick Plant.
Question 9.
Describe the tests and/or analysis performed to establish the qualification of the valve to perform its intended function under the environ-mental conditions exposed to during the DBA following its long-term exposure to the normal plant environment.
What-basis is used to establish the qualification of the valve, operators, solenoids, valves?
How was the valve assembly (valve / operators) seismically qualified (test, analysis, etc.) ?
Where testing was accomplished, describe the type tests performed, conditions used, etc.
Tests (where applicable) such as flow tests, aging sirulation (thermal), radiation, wear, vibration endurance, seismic) LOCA environment (radiation, steam, chemical) should be pointed out.
Where analysis was used, provide the rationale used to reach the decision that analysic could be used in lieu of testing.
Discuss conditions, assumptions, other test data, handbook data, and classical problems as they may apply.
Response
These valves were purchased for the environmental conditions noted on the specification data sheets (sample attached).
Seismic analysis of the valve was performed by the manufacturer (Fisher Con-trols, Inc.).
The solenoid valves and the a:tuators are standard stock items and no environmental qualification data is available.
Question 10. Have the preventive maintenance instructions (part replacement, lubrication, periodic cycling, etc.) established by the manufact-urer been reviewed, and are they being fpilowed?
Consideration should especially be given to elastomeric components in valve body, operators, solenoids, etc. where this hard-ware is installed inside contai eent.
Response
The Authority has been informed by the manitfacturer, Fisher Contrcis, Inc.,that all current instructions regarding maintenance of these valves in contained in the instruction manual which was provided with the valves, Review of this manual revealed that it covers installation, operation, and correctiva maintenance only.
However, the valves are cycled on a semi-annual basis and are leak tested during each refueling cycle.
These valvee/ operators are all located outside primary containment.
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