ML20099H427

Forwards Supplemental Info in Support of 841109 Application & Subsequent 850227 Amend.Info Concerns Control Rods,Hvac Sys,Control Room Annunciator & Scram Channels

ML20099H427
Person / Time
Site:	University of Texas at Austin
Issue date:	03/14/1985
From:	Bauer T TEXAS, UNIV. OF, AUSTIN, TX
To:	Thomas C Office of Nuclear Reactor Regulation
References
NUDOCS 8503190364
Download: ML20099H427 (3)

Text

. _ _ _ _ _ - _ _ _ . . --

THE UNIVERSITY OF TEXAS AT AUSTIN COLLEGE OF ENGINEERING i.

AUSTIN, TEXAS 78712 Department of MechanicalEngineering Department Ofce,312 471-1136 Chairman,471-1131 March 14, 1985  !

b Standardization and Special Projects Branch Division of Licensing Nuclear Regulatory Commission Washington, D.C. 20555  ;

ATTENTION: Cecil Thomas RE: Docket #50-602

Dear Sir:

t The enclosed information is provided to supplement The University [ '

of Texas at Austin application submittal (letter dated November 9,1984 and subsequent amendment letter dated February 27,1985).

Sincerely,

$ll- 2 T3 ~

T. L. Bauer TLB:jc cc: G. Fonken D. Klein H. Walls i dSO kNk Nb A PDR f

l

m n .

SUPPLEllEllTAL IflFORMATIO!!

(March 14, 1985)

A. Control rods are fabricated of sintered compacts of B C into solid rods 4

roughly 98% the theoretical density of B C. Borated graphite will not 4

be used although it has been used in other facilities.

3. Heating, cooling and ventilation air systems are central units with air temperature controlled by steam or water. A central boiler in the building provides steam for each of the air handling units (4 units).

Chilled water for cooling is provided by a central chilling unit at the research center for each of the air handling units (4 units). Condi-tioned air is generated by mixing the air volumes passing through heated and chilled coils in the unitr. One air handling unit with no return air supplies the reactor room. Another air handling unit with return air serves the areas directly adjacent to the reactor room. Two additional air handling units are installed to handle the office and laboratory areas of the building.

C. Control Room Annunciator (for auxiliary systems)

Type of Typical Set

1. Pool Water System Action Point

a. Pool Lever low 20 ft.

(above top grid plate) 0 i b. Pool Temperature high 110 F (bulkwatercoolant)

?

l L

I

o

c. Water Coolent Flow low 0 gal /sec (loss of coolant pump)

d. Heat Exchanger Pressure differential 4 psia (secondary to primary leakage)

2. Other Systems <

a. Area Radiation Monitors high 5 mr/hr

b. Air Particulate Activity high 5000 cpm

c. Reactor Room Entry s tatus OPEN

d. Ventilation System status ON Operation

3. Scram / channels

a. As specified in Tech Spec. Section 3.2.3 (dated 9/84).

b. Status condition of safety channels - scram on failure status of 1 out of 2.

c. Status condition of rod control system - scram on communi-cations failure,

d. External status conditions - scram on auxiliary input signal such as an experiment protection system,

e. Reactor period - scram for less than 3 second period in non pulse mode.

9 I

l

.