ML20151G268
| ML20151G268 | |
| Person / Time | |
|---|---|
| Site: | University of Buffalo |
| Issue date: | 04/14/1988 |
| From: | Orlosky P BUFFALO MATERIALS RESEARCH CENTER |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8804190307 | |
| Download: ML20151G268 (2) | |
Text
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BUFFALO MATERIALS RESEARCH CENTER
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April 14, 1988 1
U. S. Nuclear Regulatory Com:nission '
1717 H Street Document Control Desk
(
l WashinIton, D.C.
20555 Attention:
Document Control De k i
Report of license non-compliance This letter is a follow-up of a telephone report made to Susan Pelefchak of Region I on 4/11/88. On.4/8/88, a routine' test of our containment isolation dampers was performed. These are 'our hydraulically, operated valves in the ventilation ducts that p-netrate the containnant. Atjthatttime, one of the four dampers failed to close upon demand. When the syste= ms found to be receiving the proper electrical signals, an! electrical to hydraulic relay in the system was tapped with a hannner.
The damper imnediately closed. The dampers were exercised several times after",that, and functioned properly every time.
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The stuck relay is made by the Double A Company, and is Model #QJ SM C 10A3.
The relay uas replaced on 6/5/87. The relay was replaced at that time because of leaking seals, and not due to any failure'to function.
The dampers were operated on 3/11/88 and tested properly at that time, and so the longest period that the relay could have been faulty wcs twenty-eight days. -We have been in compliance since 4/8/88.
Since these relays have been in use for twenty-ei,ght years and have been extremely reliable, we are considering this an isolated, incident and not a generic problem. We will test the dampers weekly tor the next month, and on a random basis as convenient for the following three months.
If no problems recur, we will continue to test on a four-times-per-year basis, as presently required. Any failure to function will be reported to the NRC.. <
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I Ifyouhaveanyquestionsconcerningthismatter,pleasedonotheNitateto' }
contact myself or our Director, Mr. Louis Henry.
Very truly yours, f.
O Philip M. Orlosky Operations Manager 1
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I(0}k attachment - Page 25 of Technical Spee4.fications cc NRC Region I Dr. D. Rennie
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8804190307 880414 PDR MISC 6804190307 DCD
?UNY BUFFALO, ROTARY ROAD, BUFFALO, NEW YORK 14214-TELEPHONE (716) 8312826
- EasyLink 02910144
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5.01 DESIGN FEATURES' 5.1 Site escriotion The site of the BMRC reactor is the south center edge of the Main Street Campus
,of the State University of New York at Buffalo.
The campus isbh: tN triangle bounded by Bailey Avenue, running almost due north and south, #inspear Avenue, running roughly east and west, and Main Street ru g.ng Jrtheast and southwest.
The reactor site is about 152 m (500 ft) dueJnorth of Winspear Avenue.
The nearest buildings are Acheson Hall, Howe Buildybg,'the ' team plant and Clark Gym.
The reactor is about 30 m s
(100 ft) north of Acheson, 46 m (150 ft) west of the steam plant, and 91 m (300 ft) south of Clark Gym.
A large Veterans Admiristration Hospital is situated about 610 m (2,000 ft) east of the reactor.
The nearest residential area is on the south side of Winspear Avenue.
The reactor restricted access area consists of the containment building and the attached laboratory and office wing.
5.2 Containment Building The containment building is a flat roofed, right cylinder, nominally 21.34 m (70 ft) in diameter and 15.84 m (52 ft) high.
The vessel is construted of normal density reinforced concrete.
The walls are a nominal 61 cm (2 ft) thick and the roof is 10.2 cm (4 in.) supported by steel and concrete beams.
The floor is 1.07 m (3\\ f t) thick and the entire building rests on bedrock.
The total free air volume of the building is 5,267 m3 (186,000 ft3).
The building contains two personnel airlocks and a single barrier truck door.
All electrical and piping penetrations are sealed.
Orain lines are provided with 61 cm (24 in.) dip legs to maintain a seal.
5.3 Ventilation Under normal conditions, the containment building is ventilated by a single-pass-type system.
Filtered, conditioneri air is supplied to the vessel through two 75-cm (30-in.) diameter ducts.
Inhabited areas and some intermediate level fume hoods are exhausted through the, roof of the containment through a 91-cm (36-in.) duct.
The blower in the containment exhaust duct has a variable damper on its suction side that is used to control the negative pressure of the build-ing.
Some reactor experimental facilities and several high level fume hoods are exhausted into a 46-cm (18-in.) duct that discharges at the top of the I
steam plant stack, which is 50.9 m (167 ft) above ground level.
The stack duct
(
r is drivea by two blowers,_ one in the facility basement and another in the steam plant.
All air leavb
'he containment passes through absoluto filters.
Under emergency conditions, all fans in the containment building are.utomati-c ally turned of f and dampers in the normal ventilation ducts are autuatically closed.
Only the fan in the steam plant remains operating.
This fan draws air Amendment No. 20 25
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