ML20126H302

Affidavit Supplementing 810319 Testimony Re Polyurethane Problem

ML20126H302
Person / Time
Site:	McGuire, Mcguire
Issue date:	03/27/1981
From:	Jeffrey Riley CAROLINA ENVIRONMENTAL STUDY GROUP
To:
References
NUDOCS 8104080493
Download: ML20126H302 (5)

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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION 4 s "'h /

s g BEFORE THE ATOMIC SAFETY'AND~ LICENSING BOAR In the Matter of ) -

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(William B. McGuire Nuclear ) $#

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SUBMITTAL OF AFFIDAVIT OF JESSE L. RILEY '

AND AFFIRMATION OF SERVICE i CESG herewith submits for inclusion in the record the affidavit of.Jes'se L. Riley. The testimony therein supplements ,

that given in the last day of the hearing, March 19, 1981 and relies on Mr. Riley's observations on a visit to.McGuire unit'1 -

and his expertise as a chemist.

nocoon I affirm that copies of " Affidavit of Jesse L. Riley" have ,

been served on the' Board and the parties this 27th' day of March, 1961, by deposit in the U.S. mail, first class, except-for the copy to'Mr. Porter which was hand delivered.

Respectfully submitted,

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UNITED STATES OF AMERICA NUCLEAR HEGULATUMY CUMMISS10N -2 2 -

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BEFURE THE ATOMIC SAPdTY AND LICENSING BOARD g. d 'Js sesetst D

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. In the Matter af )

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l DUKE POWER COMPANY ) Docket Nos. 50-369

) 50-370 (William B. McGuf.re Nuclear )

Station, Units 1 and 2) )

AFFIDAVIT OF JESSE L. RILEY My name is Jesse L. Riley and I live in Charlotte, N.C. at 854 Henley Place. As a party in the named proceeding I have heard the testimony given in regard to the polyurethans problem..

I also accomponied Judge Richard Cole and Kenneth Canady of Duke Power Company on a visit to McGuire Unit 1 on the evening of March l'9, 1961.

The places visited at McGuire 1 included the interior of the ice condenser system both above and below'the ice baskets. The lower and intermediate ice - condenser doors . were examined. .The exteriors of the cooling ducts, the spaces in between, and.the upper and lower structures of the duct system were examined.

Staff Exhibit 0 was introduced as .sm approximate represent-ation of the cross section of cooled air ducts and the connection between ..djoining ducts. Significant differences'were noted.in the McGuire construction. There was no ~ flat U shaped vertical member sealed with rubber gaskets in the. space between ducts.

.Instead there was a single piece of.approximately 26 gauge galv-anized steel secured by bolts at a spacing'of 3 toih feet.

The cross section of this strip and its relation to-the ducts is shown in the following sketch.

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duct duct The bottom of the outer wall ducts-terminated.in a right angled box structu?e resting on the concrete flocr. It did:not appear at all liktly that nir could enter at this. point during a hydrogen burn er that failure was likely.

The refrigerated air. blowers, supplied with' refrigerant by a compressor in-the auxilliar.y building, vere spaced every Ento 6 ducts along both the outer and' inner sides of the ice condenser.

The exhaust and of the duct was not readily visible so'thatTit was not possible to confirm.11ds.nor an 16' inch layer of> fiber glass-over the polyursthane foam.

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_ a The' lower ica.condensor' doors-were covered by s' thin sheath of stainless steel. sheet. The doors were held shut'by braces  ;

which our: guide told us would be removed,when the; plant became ,

operational. These braces-pressed;the' doors'firmlycagainst the~ ,

stop and minimized leakage of warmer, moister air-into the1 ice  ;

condenser. This-accounts for thegto'stimony by: Applicant's witness  ;

' that.no frost formation problem had been.found st the doorscin contras t to. Staff'sl witness. who - testifiedc that bi-weekly 'mainten-ance.was necessary at an operatingplant to keep..the-doors frost .

free.- We were told that theLdoors were of a thickness-that appeared-  ;

to'be about 8 inches. ,

The intermediate level ice condenser. doors:were..four. deep.

across'the condenser radius.. Doors'1 and 2,;along'the radius, were hinged to a common member and opened back to back. Doors  !

3 and h. wore similarly. hinged. .The doors'wers. heavy'in comparison ,

to the lower deck doors. They appeared to..be covered with about: 'i 22 gauge galvanized steel and supported the weight of, persons.

walking in the' area.' Approximately 8 feet"above-the. level;of:the intermediate doors was-a grid structure covered with plastic: theets.

It was explained. that these would 'bo xblown offmin the events of the passage of air.. upward through ths' ice condenser.

The record has'estab11shedathat.the tgmperature of'a. flame'- .

of 8 5 v/o hydrogen burning in air.is 1600 F. lIntervenor's ,

Exhibit h0, Fig. 2, shows a mgximum ig hydrogen combustion '

temperature gt 32 v/g of: hky0 F (2730 K) . . The molting pointgof iron is. 2795 P (1535 c, Handbook or chemistry and : Physics) . #

The streggth of structural steel-' diminishes rapidly atitemperatures-  ;

over'700 F, Attachment 1.

- At temperatures of 1600 F and higher, and'the record shows

'that theresare circumstances in which higher' concentrations of hydrogen than 8.5 v/o may burn :in the . ice condenst r,:the: structural-strength of the; galvanized-sheet connecting cold air. ducts will be greatly reduced. It Lhas "not been shown in. the record :whether said. galvanized:sheaet will retain its form or whethereit will'be- .

bent.open'by gases released in pyrolysis..:It.isl' obvious that.it' the-sealing function of this.membarnis lost'thatmit will be poss-ible'for air to gain access to'the fonn and:for combustion of the ,

polyurethane foam'to occurs I

There'is testimony that the weight of polyursthane insulation- J

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is 27,000 pounds (Tr. 5136'). The combustion.of this amount-of a- "

polyurethane would result in.atvolume-of combustion products in

- 'the gaseous state of about 900,000 cubic 1 feet, standard conditions. .

!~ The volume of oxygen required for?such combustion is:almostc600,000 cubic fest, more than:thecroughly 200,000- cubicJfeettinitiallyThe;

.present.in the containment,-referred to standard conditions.

The net volume ;increanu ;if -allsthe; pnlyurethane burned wouldi be'

~ about D300a OCD cubic Lfeet.. . Pyrolysis,~withoutLeombustion,'would ,

produce about 250,000eubiex. feet. !To sthe sxtent that:polyurethane upyrolyzas and/or burns,e.there will be additionaltcontributionsite the pressure and teg erature'in theicontainment.-

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- Subscribed to and sworn before 2ne / Jesse L. Riley this 37 7 g' day f March, 1961  ;

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