ML20133M136
| ML20133M136 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/08/1985 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8508130020 | |
| Download: ML20133M136 (5) | |
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i CLEVELAND, OHlo 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLDG. - $5 PUBLICSOUARE P.O. box $000 Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRES 10ENT NUCMAR August 8, 1985 PY-CEI/NRR-0306 L Mr. B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Air Quality Standard for Service Air System (Instrument Air)
Dear Mr. Youngblood:
Your letter dated June 26, 1985, requested additional information concerning recent changes we made to the FSAR related to Instrument Air System air quality. Our re-sponse is attached.
Please feel free to contact me if you have any questions concerning this matter.
Very truly o rs, Murray R. Edeld Vice President Nuclear Group MRE:nj e Attachment cc: Jay Silberg, Esq.
John Stefano (2)
J. Grobe
% 40 PDR 1
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r PY-CEI/NRR-0306 L Page 1 of 2 Question 1:
Provide the basis for your system design deviation from three (3) micron ANSI, MC-11-1 limit to 40 microns propcsed limit for air quality.
Response
The instrument air system is provided with 3 micron filters downstream of the compressor and receiver tank. Thus, it is designed to limit particu-late. size to 3 microns. 40 microns was chosen as the air quality limit based upon system performance criteria and the practical limits of testing. A review of manufacturers data for all active, air operated, safety-related valves and dampers support the conclusion that limiting particulate size to 40 microns or less will ensure long-term reliable operation of.all components served by instrument air.
Question 2:
Provide verification that the involved safety related equipment will perform its intended function utilizing the proposed 40 micron instrument air quality.
Provide a listing of the safety related equipment and corresponding manufacturer's recommended air quality.
Response
As stated above, a review of manufacturers data has been conducted to assure ourselves that the equipment served by Instrument Air will perform its intended function with the specified air quality. Attachment 2 lists the identifying valve / damper number, maximum allowable particle size and the basis for the maximum allowable particle size for each active, air operated, safety-related valve and damper utilized at PNPP Unit 1.
This listing provides a summary verification, based upon manufacturer's data that the components in question will perform their intended function provided particulate size is maintained at 40 microns or less, b
Att6chment 1 PY-CEI/NRR-0306 L Page 2 of 2 Question 3:
Verify that the air quality, at the INLET of the involved safety related equipment, will meet the proposed 40 micron limit in order to perform its intended function. Provide procedures and/or technical specifications to test, detect, and correct the degradation of the proposed instrument air quality at the INLET of the involved safety related equipment in order to assure its
- intended operation.
- Response The instrument air system contains 3 micron after filters downstream of the compressor and receiver tank. Once the system has been blown clean, and air quality established (particulate 1 40 microns), it can be expected to remain clean provided the 3 micron after filters remain intact and are replaced when needed, and provided the system remains closed.
'The after filters are_ monitored for pressure drop and are replaced when necessary. In addition, these filters are checked semi-annually for signs of desiccant and other particulates. When the system is opened for maintenance, PNPP procedure PAP-0204 requires a test blow followed by an air quality test for 40 micron particle size downstream of the repair using an air particle counter.' Finally, an annual air-quality test is performed downstream of the purification equipment. Test acceptance criteria is zgro particulates larger than 40 microns and a dewpoint of
.less than -40 F.
These steps, tak'en together, ensure that the cleanliness of the instrument air system will remain adequate to allow the system to perform its intend-ed function. Additional testing at the inlet of each user component should not be necessary and, in fact, provides a greater opportunity for the system to become contaminated at the end user location since the system would have to be opened periodically at that location for testing.
We believe the methods outlined above provide adequate assurance that instrument air supplied, active, safety-related valves and dampers will operate satisfactorily when_ required.
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Attschment 2 PY-CEI/NRR-0306 L
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4" Page 1 of 2 Active - Air Operated - Safety Related Valves (& Dampers)
BASIS FOR M. P. L.
MAX. ALLOWABLE PARTICLE PARTICLE SIZE IB21-F022A-D 50m GE Document No. 22A2537 Rev. 2 IB21-F028A-D 50m 1B21-F041A-K 50m 1B21-F047A-H 50m 1B21-F051A-G 50m 1B33-F019 40m Fisher Inst. Manual IB33-F020 40m 1Cll-F010 50m GE Document No. 22A2537 Rev. 2 1Cll-F011 50m 1Cll-F180 50m 1Cll-F181 50m ICll-F002A,B 50m 1Cll-F126 50m IC11-F127 50m 1Cll-F139 50m 1C41-R004 50m lE12-F051A,B 40m Fisher Inst. Manual 1E12-F065A,B 40m 1E51-F004 40m lE51-F005 40m t:
c 1 PY-CEI/NRR-0306 L Pigs 2 of 2 BASIS FOR M. P. L MAX. ALLOWABLE PARTICLE PARTICLE SIZE 1E51-F025 40m 1E51-F026 40m 1M14-F040 152m(.006")
Telecons 8/8/84 1M14-F090 1*2m(.006")
1M14-F190-152m(.006")
1M14-F195 152m(.006")
1M14-F200 152m(.006")
1M14-F205 152m(.006")
0M23-F010A,B 790m(.031")
Telecon 8/17/84
& 8/28/84 OM25-F010A,B 790m(.031")
OM25-F020A,B 790m(.031")
0M25-F130A,B 790m(.031")
0M25-F250A,B 790m(.031")
'OM25-F255A,B 790m(.031")
0M25-F260A,B 790m(.031")
1M36-F060A,B 790m(.031")
1M51-F100 40m Fisher Inst. Manual IP51-F150 40m jh (c.