p.1 

OAR Box 1778 

Prepped by Ollie Stewart 

Document Number: 

201)11-1-34 

Docket Number: 

A-90-06 

Printed 10/28/2008 9:51:01 AM Sheet 201 of 276 
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II-I-34 

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6.23 

Wisconsin 

Eloctnc 

POWER COMPANY 

231W Miewoon, PC. BOM f0d4, fWiwaukOA. Wl 5320, («4| 221-2M8 

January 11, 1989 

Mr. Dale Ziege 

Wisconsin Department of Natural Resources m- • - i«Ql, \\ t 

P.O. BOK 7921

 1 •••t:,;. ^ • " ,"' i 

Madison , W I 5370 7 :, =— = —

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Dear Mr. zieget 

RE: AIR'HEATER REPAIR - PORT WASHINGTON UNIT 1 

Wisconsin electric 1s proposing to repair the plate type air heater at Port 

Washington Unit 1 by replacing the heat transfer surface elements Inside 

the air heater enclosure. The company believes that the proposed work is 

such, as 1s routinely performed on utility and large Industrial boilers 

equipped with direct heat transfer air heaters. However, due to the 

Interest of various regulatory agendas in the Port Washington plant, we 

wish to inform the Department in advance and request its concurrence 1n 

the company's determination that the work does not trigger applicability 

of tha Prevention of Significant Determination (PDS) or the New Source 

Performance Standards (NSPS) programs. 

The wnrk thp rnmpany 1s proposing involves the replacement of the internal 

heat transfer elements (plates) within the Unit 1 air heater. The repair 

is necessary %b halt the continuing decrease 1n the capability of Unit 1 

due to corrosion Induced air leakage in the air heater. Since the air heater's 

plates consist of 12 gauge sheet metal panels 25 feet high and 5 feet deep, 

spaced 5/8 Inch apart, it 1s extremely difficult to repair corrosion damage 

on all but the lowest 2 to 3 feet of each plate. Consequently, repair will 

consist of plate element replacement. 

The boilers 1n the first four units at Port Washington were fabricated by 

Combustion Engineering, Inc. and used direct heat transfer elr heaters. 

Combustion Engineering's air heater design used sheet metal plates to form 

the heat transfer surface while the other major boiler manufacturers then 

and now use tubes as the heat transfer surface in their air heaters. Both 

plate and tube air heaters are similar in operation and experience the same 

type of flue gas corrosion deterioration. 

Repair of direct heat transfer air heaters 1s a commonplace occurence at 

utility boilers. Attached is a list identifying at least 40 generating units 

whers repair$#via replacement, of significant portion? of the air heater 

have been done. 
EL4_ 

Mr. Oala Zlega 

January 11, 1989 

Page 2 

The company believes that tha air heater plate replacement 1t proposes falls 

within the category of routine repair or replacement and, thus, should not 

constitute a modification to Unit 1 triggering PSD and/or NSPS. Please let 

u» knurt ;r you concur in the company's determination. 

If you have any questions concerning the proposed work or need additional 

information, wt will meet with you at your earliest convenience since the 

company is anxiious to initiate the work. The company is also attempting 

to meet with Mr. SchulU, EPA Region v, to discuss this project with him. 

Sincerely, 

Mark P. Steinberg 

Superintendent!- A1r Quality 

Environmental Department 

kab 

cc; Dan Dasho - PSCW 

David Scmjltz - EPA Region V 

Attachment 
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