ML20248E108
| ML20248E108 | |
| Person / Time | |
|---|---|
| Site: | 05000356 |
| Issue date: | 09/30/1989 |
| From: | ILLINOIS, UNIV. OF, URBANA, IL |
| To: | |
| Shared Package | |
| ML19324D199 | List: |
| References | |
| NUDOCS 8910050067 | |
| Download: ML20248E108 (100) | |
Text
-_.
,- g i SAFETY ANALYSIS REPORT FOR THE LOW POWER REACTOR ASSEMBLY l
DEPARTMENT OF NUCI. EAR ENGINEERING UNIVERSITY OF ILLINOIS URBANA, ILLINOIS Septeraber 1989 8910050067 890929 ADCCK0500g,,{6 g
PDR c
!..!,h ' *
'1 y
...r..,
k.::
i y
9 e
'l s
..?i
- {.'
i' 6
or t
. TABLE OF CONTENTS EBLt SECTION I INTRODUCTION..........................................
I SECTION II SITE.................................................
3 SECTION III' REACTOR ASSEMBLY.....................................
3
.SECTION IV'
~ C00 LING............................................ 21 SECTION V.
CONFINEMENT............................................ 2 2
.SECTION VI ENGINEERED SAFEGUARDS................................ 22'
'SECTION VII INSTRUMENTATION AND CONTR0L..........................
22 SECTION VIII ELECTRICAL SYSTEM....................................
37
'SECTION IX AUXILIARY AND' EMERGENCY SYSTEMS......................
37 SECTION X EXPERIMENTAL FACILITIES..............................
38 SECTION XI RADIOACTIVE WASTES'AND RADIATION PROTECTION.......... 38 SECTION XII
'-CONDUCT OF OPERATIONS................................
39 SECTION XIII
' INITIAL TESTS AND 0PERATION..........................
40 SECTION XIV ACCIDENT ANALYSIS.................................... 40 REFERENCES APPENDIX A
__,m_... _ _..
-___._m_
_._ __=- - -- -. ~., -
l
(
o i
LIST OF FIGURES F1 cure Egg,eq l
l 1
Cross Section Plan View showing location of the LOPRA and the Illinois Advnaced TRIGA 5
2 Horizontal Cross Section of the Thermal Column 6
3 Standard Aluminum Clad Fuel Element 9
l 4
Reactor Temperature as a Function of Power Level for TRIGA Fuels 12 5
Equilibrium Reactor Power as a Function of Reactivity Insertion in Excess of Cold Clean Critical 13 6
Power Level in the LOPRA for Various Reactivity Conditions as a Function of the Illinois Advanced TRIGA Power Level 15 7
Peak Pulse Power in the LOPRA for Various Reactivity Conditions as a Function of the Peak Pulse-Power of the Illinois Advanced TRIGA 16 8
Dose Rates at Various Locations for a LOPRA Power Level of 100 Watts 20 9
Isometric Sketch of Poison Rod and Dr$.ve Mechanism 25 10 Sketch of Top View of Poison Rod and Safety Rod Assemblies Showing Location Above the LOPRA 26 11 Sketch of Side View of Poison Rod Pulley Showing Position of MicroswitcLEs and Positive Stops 27 12 Skerch of One Safety Control Rod Assembly 29 13 Sketch of Side View of the Safety Control Rods Showing the Fully Inserted and Fully Withdrawn Positions 30 14 Sketch of Top View of the LOPRA Core Showing the Location of the Safety Control Rods in the LOPRA Core Lattice 31 15 Sketch Showing Cables and Electromagnet Assemblies for the Safety Control Rods 32 16 Electrical Wiring Diagram Schematic Scram Switches and Relays 34 17 Schematic Diagram of Electronic Components in the Monitoring and Control Systems 36
w 2
1 SECTION I.
INTRODUCTION The Low Power Reactor Assembly (IDPRA) is an assembly of aluminum and stainless steel clad TRIGA fuel elements, in a rectangular array, located in the bulk shielding tank of the Illinois Adynuced TRIGA Reactor.
This assembly is coupled neutronically to the Illinois Advanced TRIGA by a thermal column consisting of a lead sheet and graphite.
In the steady state mode, the power level of.the LOPRA is limited to 10 kW.
However, the normal operating power level is less than 100 watts.
I Control of the power level of the LOPRA is accomplished by a poison rod worth approximately $1.20. This rod is driven by a motor, operated from the control panel. There are two safety control rods (held by electromagnets) worth approximately $3.00 and $5.00 respectively, which are used for scramming
.the LOPRA.
In normal operation the two safety control rods are completely removed from the LOPRA and the poison rod used to control the power.
The LOPRA is used to study the steady state and transient coupling between it and the Illinois Advanced TRIGA. This involves steady state measurements of the power level of one reactor as a function of the power -
level of the other. Measurements of the spatial variation of the flux in the LOPRA are also made.
For transient measurements, the Illinois Advanced TRIGA~
is pulsed both from a suberitical and a low power critical state with the LOPRA critical and at power levels not exceeding; 100 wetts. Measurements of the time and spatial variations of the flux in the LOPRA are made during the pulse.
The LOPRA is also used for approach to critical experiment where fuel is removed from the LOPRA core and then loaded back into the core and 1/M calculations are made to predict when criticality will be achieved.
z.
o 2
The LOPRA is also used for the purpose of determining control rod worth by suberitical multiplication. Both of the experiments have been performed many times of the years 'ay Nuclear Engineering students.
The primary safety factor of the LOPRA is the prompt negative temperature feedback of the TRIGA fuel, which limits the power. level.
The excess reactivity in the LOPRA is limited to 60 cents maximum which limits the steady state maximum power level of the LOPRA to 58 kW.
Much experience has been gained at the University of Illinois in the coupling of two assembifos and the use of TRIGA fuel. A subcritical assembly having the same fuel and lattice as the LOPRA has been operated in the same position in the bulk shielding tank during pulsing of the Illinois Mark II TRIGA(1)
A light-water natural uranium suberitical assembly has been pulsed in the bulk shielding tank (2)
A heavy water natural uranium suberitical assembly has been pulsed using the main Graphite Thermal Golumn of the reactor (3)
The University used aluminum clad fuel for seven years in the Illinois Mark II TRIGA reactor at powers up to 250 kW and pulses up to S3.00 or 1000 MW peak power using natural convection cooling. General Atomics experiments with TRIGA fuel show it to be safe for much more severe operating conditions than will be encountered in the LOPRA.
The LOPRA is intended primarily for educational applications.
Consequently a utilization license will be requested for a period of 10 years.
The information to be presented in this report combines General Atomic Reports on Various TRIGA reactors with experience on the Illinois Mark II TRIGA and analysis of the Illinois Advanced TRIGA.
[.
m 3
l SECTION II.
SITE l
The LOPRA will be located in the same building as the Illinois Advanced TRIGA.
Information on the site is contained in Section II of the " Safety Analysis Report for the Illinois Advanced TRIGA."(0).
SECTION III. REACTOR ASSEMBLY III.A DESIGN BASIS III.A.1 TRIGA Objectives The basic design criteria for a TRIGA reacter are given on pages III-l to III-6 of the " Safety Analysis Report for the Illinois Advanced TRIGA."(0)
III.A.2 LOPRA Obiectives The important. consideration in the design of the LOPRA is to utilize the coupling through the bulk shielding thermal column of the Illinois Advanced TRIGA to drive a low power reactor. To obtain the measurements which are desired, it is necessary to have a critical assembly with an unperturbed, uniform lattice structure.
III..A.3 Limits Imnosed by Desien To obtain an unperturbed reactor system, the design of the control system is such that the unit cell structure of the fuel elements is retained when the control rods are removed. Thus the control rods are situated in spaces between the fuel elements.
The limited amount of external shielding which is available for the critical assembly in the bulk shielding facility places a restriction on the steady-state power level of the system. This is due to the expected radiation levels in the area. This limit and the desire for an unperturbed flux combine to necessitate a small upper limit on the amount of excess reactivity in the i
4 8
4 assembly. As stated in the introduction, the excess reactivity will be limited to thirty cents.
III.B DESCRIPTION OF THE LOW POWER REACTOR ASSEMBL7 III.B.1 Etneral Description The Lcw Power Reactor Assembly consists of a rectangular array of aluminum alloy fuel elements located against the thermal column in the bulk shielding tank of the Illinois Advanced TRIGA. The LOPRA also has a graphite reflector which is located on either side of the core and perpendicular to the thermal column.
The location of the LOPRA relative to the Illinois Advanced TRIGA is shown in figure 1.
Figure 2 is a diagram of the borizontal cross-section through the thermal column.
The thermal column is about 41/2 feet long with a 2 by 2 feet square cross-section.
It is encased in an aluminum container lined with boral. The thermal column is adjacent to the section of the Illinois Advanced TRIGA reflector that has the through beam port in it.
In sequence from the Illinois Advanced TRIGA reflector edge, the thermal column is composed of 8 inches of graphite, a 2-inch slab of lead,19 inches of void followed by 2 feet of graphite up to the face of trie bulk shielding tank. The portion of the column containing 2 feet of graphite is lined with polyethylene to provide a greater albedo and to increase the thermal neutron flux available at the end of the column.
The support and grid plates used in the previous suberitical assembly experiments (1) will be used for the LOPRA.
The fuel elements are support?d by two rectangular grid plates mads of 0.75 inch tempered aluminum.
They are held 6 inches apart by aluminum rods.
l l'
l l
l L_______-----_
a 5
I.
L v.y ir. -
~
4 4'* m
w-nr -
g'4 "_ g
_ B'* f" '
. er e**(. H e o
w
- '.t..,s,,(v,
. ;n*.r;g,.'g
,;.d[):pl. /..
i ;
4
~
y 3
.. s...
+
. s.
varam c
f h.-
sua q asa
'g
.~
-lS :.'u.
1}f
- r.',.,
,t-u
,e
[
i
. arsat z-.;;
0, 1
e ew.
'h U 4
+
t.smeto y
[
I j
- [j sy.
o L
$['.'.', 5 j
%%h Mamre m
Mg.
N 4"eonat e..
m t
x r-og ao rg :q m
.. =.
t_
i
- a-s
$, L.'.
,L
/'M-N Jt v ? p;,*
+
c
-y
- / potverwytsar,,,
JOPith
.e,-lr:
.* ? '.
..T
'r.,t; i
am 4,.f
. amem p..
>. w
~
w vy. a
'ly V
+2..
- 9. f.'T 9(.,
sutx i
unan.
1
- ,i ranx o
o.
sY
$wo'.':::.'.". ;.'s:f*;g:cif y
s'- o" P.c g
Soittien of beam port level.
Fig. 1 CrossiSection Plan View showing locatios of the IDPRA and the Illinois Advanced TRIGA
,,n
.n-
'(:
g
~
CORE
. = = _ _
= =
=.
=-
_ _ = _
4"#ROWSM741Aff M
~
=
AAPNETK k
R5 ELECTOR jg l
=-
j
/
i i
nNA A WAAA NWV y.
,1 3 r.,
2
.J
_4::y --
'i
.., yMD 1
y
(
s,7 ORAL.
g
. p q
wwsAAMtITE l
- I 1
l
- i
.e o
I l
.o i
m
- ' M ETKLENE s
i
~
i i
i y
}d h
7.........,
LorRA i
cone 4
4 8
8 g
fag. 2 1krrisontal Cross Section of the Thermal Column
\\
~
rr lJ L
7 li The grid plates are 20 5/8 by 16 1/4Linches. The top grid plate has 1.5
~
inch diameter holes with a 1.625 inch center-to-center spacing. The bottom grid plate has 0.28 inch diameter holes with the.same spacing and are machined to receive the lower-end-fixtures of the. fuel elements. The fuel portion of the element is completely above the grid plates. The graphite reflectors are two solid pieces of graphite clad in aluminem, which occupy the first two~and L
last two columns of the core.
The LOPRA is located on a raised movable platform so that its center is in line with the center of the Eraphite thermal column. The platform allows for the movement of the assembly to and from the thermal column. The platform is moved by use' of a winch, which can be locked with a padlock, located at the '
end of the bulk shielding tan'k.
III.B.2 Engl The basic core of the LOPRA is composed of aluminum clad elements.
Some stainless clad elements of the type used in the Illinois Advanced TRIGA and/or Sandia Annular Pulse Reactor can be added in the outside rows to obtain the desired reactivity. The stainless clad fuel elements used in the Illinois Advanced TRIGA are described in the Section III of the " Safety Analysis Report for the Illinois Advanced TRIGA."(4) These elements have the same percent U-235 loading as the aluminum elements but with a higher hydrogen to zirconium ratio in the zirconium hydride moderator.
The stainless clad elements used in the Sandia Annular Pulse Reactor have a higher percent U-235 loading than the other two element types and a hydrogen to zirconium ratio about the same as the Illinois Advanced TRIGA elements. The Sandia Annular Pulse Reactor elements and their characteristics are described in various Sandia and General Atomics Reports (5,6)
The stainless elements can withstand more severe conditions than the aluminum ones, and their use on the outside of the core
c.
8 E
should not significantly affect the neutronic characteristics.of the LOPRA.
The aluminum' clad fuel elements used for the basic core are described below.
Figure 3 shows a typical aluminum clad fuel element. Each element is 1.47 inches in diameter'by 28.44 inches long. The' fuel portion of the element is 1411nches long with 4 inches of' graphite on each end.
Each element contains 8% U-235 (about 36 grams per element). Fifty-two of these fuel elements were obtained in 1966 from the Armed Forces Radiobiology Research Institute where they were used in their TRIGA reactor and an additional four were obtained from Cornell University. The fuel burnup.was less.than 0.7%
when received and they have been used in a suberitical assembly here so.that
~
the additional.burnup is negligible. All of these elements have been tested to assure that the cladding is still intact to insure that no fission products-can escape.
In 1985, 11 stainless steel clad fuel elements were obtained from Northrup Corp.
III.B.3 Lattice Approximately 55 fuel elements are needed to make the LOPRA critical.
The basic array will be a rectangular block in the rectangular grid plates described earlier in this section. The final elements needed to obtain the desired reactivity will be located along the edge of the basic rectangular
. lattice. The elements may be repositioned to adjust the excess reactivity in the LOPRA.
Graphite dummy elements may also be located along the edge of the rectangular lattice to adjust reactivity.
III.B.4 Control Devices The LOPRA has two safety control rods each with a negative reactivity worth $3.00 and $5.50 respectively. These are withdrawn during operation.
The - LDPRA power will be controlled by a motor driven poison rod with a
]
9 v.,
3 o
V.
- >4 ALUMINIUM TOP "END "Fl%TURE
~
-GRAPHITE ' REFLECTOR" v
QRWAB(E POISON d
6 DESC 45tAtt2)M-Z1RCONfuM MYDRIDE FUEL ag'
.g
%.030" ALUMIM4UM
~0 q
.CLADDENG e
NBURNABLE PO1 SON
}-
01SC 4
NRAPHiTE REFLECTOR o
m
~
1 ALUMINIUM BVTTOM N
rao nxrunE g
-r-
)(
c Fig. 3 m =a= 4 A1==s.
clad ru.1 ri -
l I
10 negative worth of approximately $1.20.
The safety system will include two steady-state power level scrams, an nv scram for operation when the Illinois Advanced TRIGA is pulsed, and two manual scrams.
The two safety rods are dropped into the assembly by gravity when a scram occurs. The rods will be held by electromagnets, which will be deenergized for scrams and when the system is shutdown.
The rods may also be raised or lowered by hand. The manual scram switches will be located in the control room and next to the bulk shielding area.
III.B.5 Instrumentation There will be two main systems of instrumentation during experimental runs. One system is for continuous monitoring of the LOPRA and the other for gathering the experimental data. One of the monitoring instruments is connected to a continuous recorder for a permanent record of the operation.
The monitoring instrumentation consists of one BF3 tube for start-up, one ionization chamber located next to the LOPRA, and one area radiation monitor located above the bulk shielding tank to monitor y's from the assembly. The 7-counter and the ion chamber are used to monitor the power level and will be connected to the scram system of the LOPRA.
The recorders and meters connected to the monitoring instruments are located in a rack in the main control room of the Nuclear Reactor Laboratory.
The power level scrams during steady-state operation of the LOPRA come from signals from the q-counter and the ion chamber.
The nv scram during times when the Illinois Advanced TRIGA is pulsed will be obtained from a signal from the ion chamber. The 7-counter is in the water level occurs when the LOPRA is in operation.
11 III.B.6 Control Panel The control panel for the LOPPA will' be located in the main control room of the Nuclear Reactor Laboratory. This panel contains the controls for moving the poison rod, the meters and recorders for the monitoring instrumentation, and a manual scram.
III.C.
REACTOR DESIGN EVALUATION AND ANALYSIS III.C.1 Fuel Performance and PropertitE The inherent safety of TRIGA fuel is gained by the prompt negative temperature coefficient.
The temperature coefficient is of sufficient size that the power level and fuel temperature are limited by the amount of excess reactivity in the reactor. The relationships between the equilibrium reactor power level and the fuel temperature is shown in Figure 4 The relationship between the equilibrium power level and the reactivity insertion is given in Figure 5.
These curves are for the aluminum clad fuel. Very little difference can be noted if stainless steel clad elements are used as shown by the same relationships on pages III-28 and III-29 of the " Safety Analysis Report for the Illinois Advanced TRIGA."(0)
The steady-state operation of the LOPRA is on the lower end of these curves because of the limitation on the excess reactivity and the steady-state l
power level.
The peak fuel temperature will be less than 80*C which is well below the safety limitations of this parameter.
l l
III.C.2 Coupline of Reactor Systems The coupling between the LOPRA and the Illinois Advanced TRIGA reactor refers only to the effects of utilizing the neutrons in the thermal column as a source for altering the power level of either reactor.
In general, the neutrons in the thermal column generated from operating the Illinois Advanced TRIGA, will be used to drive the LOPRA.
These effects are measured for both l
l l
I
12 k?
I v-
/
s C EfW TER 0r.ru ELEM7 O
E
/
de N
/
anear f
f SURF AC E (V5 DE-R,.CLA09%NG)
E 3
6C Y
c
<V
/
zU
~
s C
WATER TENPEMTURE.
W RI.5E THROUCH CORE:
2D m
80 20 40 GO so
/co
/20 R EAC
, OR
?O VER LEVC G V)
Fig. 4 Reactor Temperatures as a Function of Power Level for TRIGA Fuels
_ y 13
,['
A-o E'
e
,,,,. g
/
.J
'E W
i
(
(
3 40.
O-0 0.20 0.40 0.60 OAO l.00 1tEACTIVITY lNSERTION(DDLLARS)-
Fig. F Bart:111hritan Reactor Power as a Function of Beectivity Insertion in Excess of Cold Clean Critical
si 14 steady-state and pulsed operation of the Illinois Advanced TRIGA. The 1
reactivity effect between the two systems is small.
In previous operations 1
with a suberitical assembly of TRIGA fuel elements in the bulk shielding facility!(k gg - 0.95), no reactivity effects on the Illinois Mark'II TRIGA e
L could be detected.
The power level of the.LOPRA is affected by the power level aof the -
Illinois Advanced TRIGA. These levels have been calculated for both stead-I' state and pulsed conditions and are shown by Figures 6 and 7.
Figure 6 shows the power level that would be attained in the LOPRA due to operating the Illinois Advanced TRIGA in its higher power ranges. Gelculations have been made for various critical conditions of the LOPRA.
Figure.7 shows the peak power levels expected in the LOPRA when the Illinois Advanced TRIGA is pulsed to various peak power levels. As in the case for the steady state condition, calculations have been made for various
- critical conditions of LOPRA. The basic measurements are made with LOPRA critical at a low steady-state power (less than 100 watts) when it is hit with the neutron burst resulting from pulsing the Illinois Advanced Triga.
The burst will be short enough so that only prompt neutrons will be produced.in the time of the pulse. Since the multiplication of neutrons in the LOPRA is only due to prompt neutrons, the multiplication will be the same as the steady state multiplication of an assembly that is $1.00 suberitical. Using this assumption, calculations for Figure 7 were run and gave a peak LOPRA power of 0.8 MW for a peak pulse power of 7000 MW.
The nyt of the LOPRA is expected to be less than 10 kW-seconds The LOPRA pulse will not produce a reflected pulse large enough to have any effect on the Illinois Advanced TRIGA. This is so because the pulse width in the Illinois Advanced TRIGA is wide enough (15 msec) so that the time the
COUPLED POS/ER LEVELS
('-
PowrA LEVEL IN Lo7WA-VS.
POWER LEVELS IN THE ILLIN Ott ADVANCED TRrtA (WO CONTROL ROD MOVEMENT )
37 30 4 Apovs cosa enere p
--~
- ~ ~ ~ ~ ~ ~
so 25
~ 3 20 C5 t
f c,#*[//
l as 1,6 y
m 4
/
c 5,/
)' '
ggt RM g
[
s'#
t s'4 8g
/
,A 5
/
f gs L*
" ~
l OL 6 6
/
~~
l W
fj.co s quew CRET V *
- t-
.1 0
,2,
. t.
.6
.a 10 1.3.
I.4 LLLI N OIS AD VAN C ED TKi ch P O% fen (M %f)
Fig, h Power Level in the 1DPRA for Various Reactivity
~
Conditions as a Function of the Illinois Advanced TRIGA Power Level I
16 PULSENG PEAK POWER.
o.-
l PEAK POhER IN LDPRA
~ Jts.*_
pan -
PEAW ~POWSA IN TM ILRENots ADVAktes fRTat PO4 ILL XMOZ8 AD$4C40 TR1SA PUL&84 kWD Waft %DUS COLD AS ACTIVITY VALp!$ 'reR LOMBA
/
//
/
A,f
(,,_
y e __
/,
C
/
=g
/
m_
{.
3 conet..
so$ asovs cots cazTzent
/
carmWE 2 cats CRETICAL 3~
f CPNTE T ~197 DELUV CKETIEAL
/
convt + 44.00 SELow entfLAAL
/
l ta C
1000 220 3000 p
seso 6000 TC #
i ILLINCIS ADVANCED TMICA FTAM POVER CMW1 Fig. 7 Peak Pulse Power in the IDPRA for Various Reactivity Conditions as a Function of the Peak Pulse Power of the 1111 acts Advanced TRIGA
17
.n
' reflected pulse returns (7 msec) to the Illinois Advanced TRIGA it will still be at a high ' power'and suberitical.
Thus the introduction of the' neutrons 0
from the LOPRA, which are attenuated by a factor of 10, will not be large enough to affect the Advanced TRIGA flux.
III.C.3 Reactivity Values III.C.3.a Fuel Elements The rectangular lattice for the fuel elements was designed to obtain the same water to' fuel ratio (30-35% water) as that found in other TRIGA cores.
This water ratio is used to obtain optimum moderation and to assure that the system will be suberitical if voids occur in the core region. As a result, the reactivity worths of the fuel elements will also be similar to other TRIGA Cores.
The reactivity worths.of individual elements is estimated to vary from
'$0.20 to $1.50 depending on their distance from the geometrical center of the array. Accurate measurements of the reactivity worth fuel elements can only be'obtained for those in the outer periphery because of the limitation on the excess reactivity.
The reactivity worths of fuel elements in the outer rectangle may vary by a factor of two due to the difference in the distance to the center of the core.
III.C.3.b Experiments Experiments with large reactivity worths will not be utilized in the core region because of the desire to maintain a smooth flux profile with l:
minimal perturbation in the core.
It is anticipated that gadolinium or cobalt wires will be used to make the desired measurements in the core region during operations. The reactivity worth of these devices is estimated to be less than 10 cents.
j,,
'N
- (.. _.
?:
e{'
i w
L.
.III.C.3.c.. Movement of~ Assembly
~
Since the assembly. is located adjacent to the bulk shielding thermal column as shown in Figure.1, graphite will" serve as a reflector and will h' ave an effect on the reactivity.
ItLis estimated that this worth will-be a lpositive20 cents. As'a result, any movement of the' assembly will reduce the reactivity'of the system.
'III.D SAFETY LIMITS III.D.1 Engl III.D.l.a coeratine Levels The. safety limit:for aluminum clad TRIGA fuel elements is based on-a fubl-moderator temperature where a phase change occurs in the zirconium
' hydride.9) 'This temperature is about 550*C.
For'a TRIGA system this -
2 corresponds to a steady-state operating level of over l.0' megawatt (natural convective cooling) and a peak power of about 1,000 megawatts for a pulse.
The. safety limit for stainless steel clad elements is considerably higher than the above values since no phase change occurs with the larger hydrogen.
. content.
As a result, if the power should reach a level of 10 kilowatts for steady-state operations or a peak power of 10 megawatts when the syst'm is e
pulsed by the Illinois Advanced TRIGA, there will be no detrimental effect on the integrity of the_ fuel.
III.D.1.b-Loss of Water If an-instantaneous loss of water occurs in a TRIGA core following a long term operation, the idel temperature will exceed the level during the operation because of the poorer cooling mechanisms. Although the reactor would become suberitical, the gamma heating from fission products will i:ause the temperature to increase.
Previous calculations (8) show that such long
E6U
,f l
l:
19-a.
. term operations would have to exceed 200 kilowatts for the fuel temperature to Treach the.550*C of the previous section. Although the possibility of losing
'the water in the bulk shielding facility ir. remote,.such an occurrence would l^
\\
not endanger the integrity of the fuel.
1 1.
III.D.2. Radiation Levels l
The limiting conditions to be imposed on the operating levels of the
'LOPRA' result from the amount of external shielding rather than any possibility l
'of fuel damage.
The selection'of maximum operating levels on this basis becomes one of judgment in assuring that a dangerous radiation level. is never reached and that adequate controls are available should radiation levels occur l
where immediate action is required.
The measured 'ose rates at various places around the bulk shielding d
facility the LOPRA operating at 100 watts are given by Figure 8.
These are:
Region Dose Rate (mR/hr)
Water surface above assembly 24 Six' feet above water surface 12 1
Three feet above floor at end of bulk shielding tank 4
On reactor deck above the assembly 6
It is estimated that for a pulse where the LOPRA power level reaches a peak of 1 MW, the incegrated dose would be equivalent to 10 watt-hrs of steady state operation. The above values were determined from measured values 8 feet abovo the core of the Illinois Mark II TRIGA Reactor. These values are r
.equihalentforthosereported'inAmendmentNo. 6 for the facility license R-69(1)
The operation of the LOPRA is regulated to assure compliance with the provisions of 10 CFR 20 regarding restricted and unrestricted areas and
l
. </
T..
.. ~. '
. i f,/,', 2 =.*....:.
,/,' /..:.. n,.-
/
/
- . l.'........
I
/ / V i
/
/?
' / y ',,, -
3OI. i;., ?.
~
h '~.. -
/
_I 0'
~
UW
~
T i
V I
i p
t u
e II dT C
e N
[
-, A K
/8_ q:s.
I I
E T I
i 1 r a
/A 1
I R
I i
I*.
R 1
I N
y'/,/..... <
/.,
- Ii;IL
. I I
/
I
..l.-
//
f eIl e
l i
I-.
... 'l.
/'
n N
M-
-G r
~
.~.I I
i
_1 I
I
?
ly p
n I
t
~.
I i
1
~
R
- n.~~
y s
l
~
n 1
- H A
I I
/
a R
R 0
~
s f
s;
.R I
i I
O 4
- g
^
I
'r I
9 e
t L
r K E y s
I 1
E g
e M 'Ie t.
e.
I I
I y H
'8
.q y S-z h.,
l 1
i I
I i N'l B
~
' l e s l> I
..I Tr
. ; 1 ';:
T..
I
. s.
I a
e 3
n n
's
}.,:u. i i's t*
s r
s 1
g',t 4
... e..
il l,;l,.
,\\:y@
,,l
. ; {1.... d.,. ' i s.. }.i'~ d 8.A.$.
l
>/_-
s.
t d.
.. f.
e uja s J.
,,- ln.
4
/
2...
%T' a
t o,J L
N
=
A E C
M I
M N P T
0 I
=
I H U 0 L
C Q R U
//-
A E E M
V
=..
r,ElA<.e';...
....,..,i. ';, - '.
L, iI
,,t
)
YE i
1 21 personnel exposure.
From the above, a maximum safety system setting on the
. power level during steady-state operation has been selected at 10 kilowatts and-the peak power, resulting from pulsed operation of the Illinois Advanced TRIGA, has been set at 10 megawatts. The normal operating power levels:of the
. assembly will be considerably.less than these values.
III.E TESTS AND INSPECTIONS The reactivity worths of the control rods is measured routinely twice a year and recorded. These values have been consistent'over the years of operation of the LOPRA. The reactivity worths of measuring devices placed in the core region are measured and recorded in the permanent log record. These reactivity worths are checked when the device is initially used in the core region.
Periodic checks on the safety control rods, poison rod and fuel are made to assure that there is no evidence.of corrosion or deformation. The operational procedures and the daily' pre-operations checks are given in Section XIII.
SECTION IV.
COOLING Because the LOPRA has a low power output and is located in the bulk shielding facility which contains about 6000 gallons of water, no external cooling is required. Thermal energy balances for the system predict that the bulk water temperature in the tank will increase about 0.05'C for each kW-hr of operation and about 0.0005'C for'the integrated power as a result of a pulse by the Illinois Advanced TRIGA. Both are negligibly small for the operating power levels of the LOPRA.
During both steady and pulsed operation the core region of the lopra l'
will be cooled by the free convective. flow of water in the bulk shielding
,e' t-s 22 F:
facility. The core design presents minimum flow restriction which enhances-the free convective flow through it.
SECTION V.
CONFINEMENT
- The IOPRA is located in 'the University.of Illinois Nuclear Reactor Laboratory.
The. building and its confinement is described in Section V of the
" Safety Analysis Report'for the Illinois Advanced TRIGA."(4)
SECTION VI.
ENGINEERED SAFEGAURDS The building exhaust filter system, designed for the Illinois Advanced TRIGA and described in Sections V and VI of the " Safety Analysis-Report for the: Illinois Advanced TRIGA,"U+) functions as a safegaurd should any release of radioactivity occur from the LOPRA. Additional safegaurds are not required.
SECTION VII.
INSTRUMENTATION AND CONTROL The instrumentation and control system of the LOPRA was designed to provide information on the power level, control of the power level, and adequate safety systems to assure that the system can be shutdown under all conditions. The excess reactivity limitation gives and inherent control over the rate at which power might change and places an upper limit on the other operating parameters. This limitation plus the small degree of coupling between the LOPRA and the Illinois Advanced TRIGA assures that the integrity of the fuel elements will not be endangered.
k S :
23' VII.A DESIGN BASIS VII.A.1. Power Level The system provides accurate information on the power level of the LOPRA during start-up and operation of the facility. The system has provisions for initiating a reactor scram should the power level of the LOPRA cause excessive radiation levels in the Reactor Laboratory.
VII.A.2' Power Level Control Provisions are available for ' adjusting the power level to a desired value.
VII.A.3 Control Rods.
Control rods with scarm capabilities are provided to assure that.the reactor can be shutdown under all conditions. Sufficient control is provided to assure a subcritical condition results if 'one of the control rods failed to drop.
VII.A.4 Radiation Protection Radiation monitors are located in the vicinity of the assembly to give an early warning of abnormal levels. Additional monitors are in the laboratory to serve as protection to personnel in the building.
VII.A.5 Scrams In addition to the protection served by the power level scrams manual scrams are provided to assure that appropriate action can be taken by individuals in charge of the operation. The scram logic is such that the system is fail-safe and that a single incident cannot remove all of the scrams l
from the system.
l-L __ __-- _ _ _ _ _ - - _.
p
~
.(,-
t g
24-V
- VII.B SYSTEM DESIGN VII.B.1 Power Level The power level instrumentation will consist of a BF3 tube and associated' circuitry for start-up, an ion chamber whose output is connected to a recording device, and a y-chamber located directly above the reactor assembly. The ion chamber and.y-chamber give readings of the power level during steady-state operations of the LOPRA and any effects that occur from operating the Illinois Advanced TRIGA at high steady-state power levels. When
' the. Illinois' Advanced TRIGA is pulsed, the' ion chamber will be connected to a circuit to indicate the peak power of the LOPRA.
Reactor scrams can be initiated by either the signal from the ion chamber or the y-chamber. During pulsing of the Illinois Advanced TRIGA,'the' signal from the ion chamber will initiate e scram if the peak power is higher than a preset value..The y-chamber would cause a scram during pulsed operation of the Illinois Advanced TRIGA if the power level of the LOPRA should remain at a high steady-state value.
VII.B.2 Power Level Control The power of the LOPRA is controlled by a motor driven poison rod worth approximately $1.20. The motor is operated from the panel in the control room. The speed of the rod.will be limited so that the maximum rate at which it can be withdrawn from the core is 1/2 in./sec. This will give a reactivity change of.about 4 cents /sec. at the mid-position of the rod.
Figures 9-11 show various aspects of the poison rod assembly.
The poison rod consists of a watertight hollow aluminum pipe with a sheet of cadmium rolled in it, and enough lead in the bottom to keep it from l~
being buoyant.
The rod is 1/2 inch in diameter and 20 inches long.
It goes in the space between 4 fuel elements, these elements acting as a guide. The
_ _ _ _ _ _ = - _ _. -. - - - _ - -. _ _ - -
25
.q-
,.~
,. s, e ys,.
e n ',.... x'
.i' H t.-
t '.' ' '.* ~
NOFASa.E anzaet j
/
i
~
f sv e
/
/
.. '. '., d
/-
/ ~/
/
o J
t n
- \\;
.~..
noron s,
N
-CEAn PVLL Y A.
j TRICA*
j,
t SHIELO, ;
n wras
. '. h s
~
s.
b
(.
BULK SKZELDING TANK
- .w o
4.4 f
j a,s m
. ** t
,,; )>
/
e 1 0*' A D 4 U3TA B LE POZ$0N MOD
.,1
- 'g/.
~ **
Jr e9 yW Fig. 9 1.o.etric sketch of Poison nod and Drive Mechanism m
4 26
{:-
. :. s. t :
.,..,v.,,.,
%.'k.'.:,
~,/.*.i I
..TRIGA SHIELD s
,s.
6
.....s-
.'<.. :.: *. % i,..&,,... *..'...'.. * :'..',s.
s .3 k ':.: '.., >,/./
i LOP R A 9g,,34 n ry
- EsusLY g
evran Magl{
wins arn aox
- g
)
noTon L
is m
u, 7 ruu.rv SarosF C
~
BULK SHIELDING
- VAT E Ps '~
TA NX
- g, l
Fig. 10 Sketch of Top View of Poison Rod and Safety Rod Assemblies Showing Location Above the 10PRA 1
i-4 O
27
-f POSITIVE STOP5
\\'
(
i 11rc ROS VZTC N' 1
,,, e CONTACTS s'
s i
t
/
'/
t
=
C Z" W POSITIVE STOP 3
Nmxxxxx3pxxxw xw MICM o SVITC HES Fig. ll Sketch of Side View of the Poison Rod Pulley Showing Position of l
Microswitches and Positive Stops i
Il-a
t 28 L
rod is attached to a-cable which goes over a pulley onto a wheel 7 inches.in diameter.
(Fig. 9-10) This wheel is connected through a gear box to obtain
)
the required speed.' The sheel has two microswitches to indicace the up and down position ~and to stop the motor drive. Mechanical stops are located to l
keep the rod from being lowered or raised more than is desired.
(Figure 11)
The travel of the rod is limited to an inserted position of about one inch above the: top grid and a withdrawn position.of about one inch below the top part of the fuel' elements. The motor assembly is placed on one of the movable bridges above the bulk shielding facility. The postion of the rod.is indicated on the console rack in the control' room.
I During the initial loading of the LOPRA, the poison rod was located near the center of'the core. After a critical lattice with less than 30 cents excess reactivity has been obtained, reactivity of the rod was determined to be approximately $1.20.
VII.B.3-Control Rods The system contains two safety control rods with scram capabilities.
Figures 12-17 show the design and the location of these rods.
Each safety control rod consists of an aluminum bar 21 inches long, with hollow watertight aluminum tubes 1/2 inch in outer diameter, 20 inches long, welded to it.
Each tube has one inch of lead at the bottom and then 10 inches of a cadmium sheet rolled inside the tube (Fig. 12). The bar has two guide tubes 30 inches long,
)
attached to each end.
These tubes drop down channels designed to guide the safety control rod into the core.
The channels (Fig. 13) restrict the movement of the safety rod. When inserted, the rod bottom is about one inch above the top grid plate. At the upper stop, the bottom of the rod overlaps the fuel elements by approximately one inch. This stop prevents the safety control rods from being removed completely from the LOPRA.
The safety rods
3 g:; /~
- 29:
'f_ v g
.:s (j f.
[2 E
C:.
- h..
s 3b" g
jo s
1 1
c 3
3 E,
E E
g j
E
~
4 1
3 1
6 e
1 e
O O
V j
V O
g.
I..
.e a
a a
s
.L
.L, s
.s.
,.6 6
JL Fig.12 Sketch of one Safety Control Rod Assembly
r a 0e 30 1
r l
SAFtry MOD Assansky X
q-JI s,
\\
I J
II" stor pta y Cd jrV
/
e 4
/
)e*o C
I, FVil /
////,R 7
Y'j j
THERNAL
/
U, COL UM N
/
/
/
\\
/
/
/
ll/ /
/
\\
/
/
/
/
l.
/
/'
/
r_.i N4 E.J T
//
o o
O
/
0a
/
O o
1 J c. Y[
3/
I
/
1 Fig,13 sketch of side view of the safety control Rods Showing the Fully Inserted and Fully Withdrawn Positions
,i.O,
- .a -
31-THEliMAL COLUMN-
/
/
0,,
///
'/ ///
g 4
4 a
L 000CDOODDDOC m
DODDDDDDDOC
, j%
r onmmmmmmmon n
D x x xoxoxoxoxoxox x ><
o L Ub WWWWWWJV l --
m C,A,_
n,,,,,,,,,
e c
O XX X0X0XoX4)XCKoX X X
- ()
Q F W WWWWWWW VU l
T OCOOOOOOOOC 000000000 00
\\ G o pw,te Refl u+ ~s >
Fig.I4 Sketch of Top View of the LOPRA Core Showing the Location of the Safety' Control Rode in the LOPRA Core Lattice
____mm__m_.__m.._______.
32 e r ac p c;'
'.2N L
p?)N
_V.
~~E L ECTR 0 M A CNET
[
l N
L.
TUBE i
A-1 i
ARM ATUR E i
i E
l l
/
C I
.}1 l
",.r
~. '
Ob10bb l
./
't:
/
Q
-J uJ N
vs te k
v v
v
/
/
/
/
.(
Fig. lT Sketch Showing Cables and Electromagnet Assemblies for the Safety Control Rods
_--____---------.---------------_o
t -
33 are located between the third and fourth rows and between the sixth and seventh rods of the LOPRA (Fig. 14). The rods are held by a wire cable which is attached to an armature in an aluminum tube located directly above the rods (Fig. 15). This uruature is held by an electromagnet attached to a cable and lifting rod. The magnet assembly, armature, guide tube and lifting rods, as shown in Fig. 15, are designed to prevent any external interference with the free insertion of the safety rod during a scram.
VII.B.4 Radiation Protection The radiation protection system is described in Section XI of the
" Safety Analysis Report for the Illinois Advanced TRIGA."(4) This system will give audible and visible alarms should abnormally high radiation levels occur in the laboratory.
The y-monitor, located directly above the LOPRA assembly, is utilized for determination of the power level and for radiation protection. During normal operation, the system is set to cause a scram of the LOPRA and to give an audible and visible alarm if the safety syttem setting is exceeded. This setting is based on the steady-state power level of the LOPRA. However, should an abnormal cor.dition arise, such as a reduction in the water level in the bulk shielding facility, this would be noted by an increase in the reading of this monitor.
In this and similar circumstances the protection of scramming the LOPRA as well as audible and visible alarms to alert personnel is present.
VII.B.5 Estams The LOPRA is scrammed through an interruption of the current to the electromagnets of the two safety control rods.
This may be initiated by an electrical power failure, by a high steady-state power level, by aa excessive peak power level when the system is pulsed by the Illinois Advanced TRIGA, by
l' I1 5
ts RO A T EI
,l 2
RN ST M
AO E
M mANy c
i R
d R
M A
lI E
E V l
k N
I O m
L P a
li rc S
g M
n i
O wo O
h
=
R Dn S
L O K c
s
,,3 l
i AL RC 1
t
- ^
UO ma L
NR N
e o
h O
c AT R
S S
, i ' s l I I T
1-MN rN ma o
o o r
c P
g c
a iD sy ga nl i e rR a
iWd a
n r
l a a
= m.g cs i e y
rh u
t c nn ct l
ei ai l w ES nm
=
d a
l
.g i
F C
A T
V n
ERy 5
c C
1 NE t 6
T A
GUe V
I AOe W
5 v
MPs I
I S
ell if I
s :
lI li4.
'4
v 35 i
an excessive radiation level above the assembly, or by manual buttons located in the control room and at the bulk shielding facility.
The functional diagram for these scrams is shown by Figure 16.
Primary power is applied to the magnet power supply by a key switch.
The output from the magnet power supply is supplied to the magnets through a series scram bus.
The scram bus contains the relay contacts for the two power level scrams and the switches from the manual scrams. The manual scram at the console opens two sets of contacts to allow the individual control rods to be dropped and to insure that a single short would not disable the system.
The functional diagram for the two power level channels is shown by Figure 17.
This figure also shows the primary supply of power to the linear power channel, the magnet power supply, and the poison rod control circuit.
VII.C EVALUATION The instrumentation and controls have been provided in view of the low limitation on the excess reactivity and the inherent safety of a TRIGA reactor. The power level instrumentation will give adequate information on this parameter and provides protection against excessive radiation levels in the laboratory.
The manual scrams allow for a rapid shutdown from either the control room or at the bulk shielding facility.
Although only two safety control rods will be utilized, either of these rods, if inserted individually, will provide a shutdown margin of at least
$3.00.
The administrative controls given in Section XII are set up to place close regulation and surveillance on the loading of the fuel elements into the LOPRA.
VII.D TESTS Checks on the operability of the power level instrumentation and the safety control rods are made each day the LOPRA is placed into operation.
p+...
(;
LI N EA R POWER CHANN E L KEITH LY AMP a RECORDER r
--+
CH AMBER g
RANGE SVITCH HV. POVER
-+ BTSTA BLE SCRAM
-+
SUPPLY
' AREA MONITOR CHANNEL GAMM A POWER METER
(
CH A M B EM SUPPLY R rL A Y TR AC E R L A B SYSTEM INCOMING IISV 60 ~
LINEAR PO VE*6 CHANNEL KEY SU I T C H MAGNFT rowsR SutPLY g
PoIJ o M ROD
Fig.Il Schematic Diagram of E1cetronic Components in the Monitoring and Control Systems
..,~o l'
L 37 When the system is not in use it is decoupled from the Illinois Advanced TRIGA as indicated later in Section XII. Written procedures will be utilized for returning the system to an operating condition.
l SECTION VIII. ELECTRICAL SYSTEM l
The electrical power system to be utilized is the same as that described in Section VIII of the " Safety Analysis Report of the Illinois Advanced TRIGA."(0)
SECTION IX.
AUXILIARY AND EMERGENCY SYSTEMS IX.A WATER SYSTEMS IX.A.1 Building The water supply for the Nuclear Reactor Laboratory is described in
' reference 4.
This supply has a capacity of about 3000 gpm, at a pressure of 50 psi.
IX.A.2 LOPRA The bulk shielding experimental tank, when filled, contains about 6000 gallons of water.
The water is kept at high purity when fuel elements are either stored or utilized in the facility. The water is circulated by a pump through a filter and demineralized resin to retain the purity. Water, to replace that lost by evapoartion, is demineralized by the Illinois Advanced TRIGA make-up water system before being added to the bulk shielding tank.
IX.B FUEL STORAGE AND MANDLING The fuel storage capacities for the University of Illinos Nuclear Reactor Laboratory are given in Section IX of reference 4.
Storage space is available for either cold or irradiated fuel elements.
38 only those fuel elements utilized in the operation of the IMPRA will be stored in the racka on the walls of the bulk shielding facility when the system is being used for experimental purposes. Any remaining fuel elements are located in the other storage facilities of the laboratory.
With the exception of the fuel elements that were designed as instrumented elements, the fuel is handled with the tool described in Section IX of reference 4.
When not in use, this tool is stored in a rack and locked in place to prevent unauthorized movement of fuel elements.
IX.C REACTOR BUILDING SYSTEMS The remaining auxiliary and emergency systems that are available are described in Section IX of reference 4.
This includes the building cooling and heating system, lightning protection for the building, radioactive storage, and the decontamination shower.
SECTION X.
EXPERIMENTAL FACILITIES The bulk shielding facility is considered to be an experimental facility of the Illinois Adynaced TRIGA.
In this sense, the LOPRA is an experiment to be utilized in the operation of the Illinois Advanced TRIGA.
The movable bridges described in Section III are utilized for mounting the measuring devices which are placed near or in the core region. As j
indicated in Section III, these devices are expected to have only a slight resetivity effect on the reactor.
1 SECTION XI.
RADIOACTIVE WASTES AND RADIATION PROTECTION The solid, liquid, and gaseous waste systems and the area monitoring protective system for the Nuclear Reactor Laboratory are described in Section
8<<
o 39 h
'XI of reference 4.
Each of.these systems is available during operations of h
the LOPRA.
The bulk shielding experimental tank is.12 feet deep, 8 feet wide, and 9
- feet long.' -Figures 1 and 8 shc7 horizontal and vertical views of this facility. Ths minimum shielding protection occurs directly above the assembly.
where there is approximately 8 feet of water. The maximum protection is in a lateral direction where the reactor walls contain over 4 feet of concrete.
The shielding in the direction of the mechanical equipment room is gained from 8 feet of water and one foot'of concrete.
Extimates on dose rates, related to the power level of the LOPRA, are given in Section III.D.2.
Operations at the higher power levels are limited in time to assure compliance with the 10 CFR 20 limits on restricted and unrestricted areas and personnel exposure.
SECTION XII. CONDUCT OF OPERATIONS The organization and responsibilities for the administration of the LOPRA will be the same as that outlined in Section XII of reference 4.
The Nuclear Reactor Committee will be directly responsible for the safe operation of this low power reactor.
The following special administrative provisions will be in effect during all times when there is sufficient fuel in the bulk shielding facility to make the reactor critical:
(1) Movements of fuel shall not be made except under the direct supervision of a licensed operator of the LOPRA.
(2) The LOPRA shall be locked in its position adjacent to the thermal column to avoid any inadvertent movement of the platform assembly.
(3) During times when the experimental work with the LOPRA is not in progress and the Illinois Advanced TRIGA is to be operated in the
g:.2.-1 y l~\\
40-t 1/
pulse mode or in steady-state mode,'the LOPRA shall be shutdown It with the following conditions:
l.
(a) The. platform'containing the grid plates and remaining fuel elements will be moved several inches from the thereal columni and locked in this position.
(b) A neutron absorbing curtain will be placed between the thermal column.and the 14PRA core.
.SECTION XIII. INITIAL TESTS AND OPERATION Information on the initial test and operation of the TRIGA is contained in the Report on Uta re-up dated January 18, 1972. This Report is attached as Addendum A to the SAR.
SECTION XIV. ACCIDENT ANALYSIS ~
. XIV.A INTRODUCTION The LOPRA is a low power reactor assembly of TRIGA fuel elements. The operation will be well below the safety limits which have been shown to be safe'from previous operations of TRIGA systems.
The type of accient which might occur from malfunctions of the systems or from errors in judgment or operation, could result in high radiation levels in the vicinity of the bulk shielding facility. However, the levels that might be anticipated under these conditions are low enough whereby corrective measures could be made without excessive exposures to the individuals involved. The accidents to be examined are the removal and failure of the control system and the loss of water.
o.
o
.o 41 XIV.B EXCESS REACTIVITY CONSEQUENCE If the LOPRA is loaded with 60 cents excess reactivity and all controls are removed (the two safety control rods and the poison rod), the reactor power would increase on a 3.5 second period until the prompt negative temperature effects are noted.
The power level would eventually reach a level of about 57 kilowatts. Using the measured doses on page 17,Section III.D.2, the radiation level at the water surface would be about 13R/hr. On the reactor deck above the assembly, the rate would be about 3.9R/hr.
Under these conditions, if one assumes that the control system does not operate due to misalignment, an individual could remove fuel elements from the assembly while standing on the reactor deck. The time for the removal of a 1
centrally located element would be less than one minute.
This removal would be sufficient to make the system subcritical and the total dose received by the individual would be less than 70 mR.
Even if the error were compounded and the excess reactivity were as high as 80 cents, the power level and resultant radiation levels would still be low enough for the same type of corrective action to be made. The heating of the water in the bulk shielding facility at a power level of 57 kilowatts would be less than 3'C per hour.
XIV.C LOSS OF WATER The loss of water in the bulk shielding facility is considered very unlikely since there are no openings which extend to the facility from the concrete walls.
However, as noted on page 16,Section III.D.1.b, no damage to l
the fuel would occur, if the water were completely lost, because of the low operating power levels.
A loss of water would result in high radiation levels in the vicinity of 1
the facility. Using the calculation from pages XI-18 to XI-23 of reference 4,
I-L
- ,g-42 the radiation level directly above the assembly would be about 60 R/hr immediately-following a continuous operation at 1.0 kilowatts. After one day, this level would be about 8 R/hr, which would allow movement of the fuel elements to a separate storage facility in the reactor laboratory.
XIV.D OBJECTS FALLING ONTO THE CORE The core of the LOPRA has protection from falling objects during operation since a steel bridge across the bulk shiedling tank will be located above the core.
In addition, the reactor deck overhangs the core when LOPRA is adjacent to the thermal column. Thus, objects cannot fall into the water directly above the core during operation of the LOPRA.
If objects should fall into the bulk shielding tank water, the bouyancy of the water and its resistance to rapid free fall motion would greatly reduce the force with which the object could strike the core. However, the likelihood of an object, which enters the water not directly above the core, striking it is small.
If an object should fall on the core breaking the fuel elements, the two most serious effects which must be considered are those of reactivity changes and the release of fission products.
Since the LOPRA is optimally moderated for the fuel-water ratio of the lattice, any compression or expansion of the core would decrease its reactivity.
The fission product inventory in the fuel is not large since the LOPRA will be operated at low powers and for short periods of time. Using an estimate of 6 months of operation at 100 watts, assuming that the whole core or 60 elements are ruptured and using the analysis of Section XIV.D.2 of the " Safety Analysis Report for the Illinois Advanced TRIGA,"(4) the fission product release would be; 13 e of Kripton, 30 pc of Iodine and 25 pc of Xenon.
The Iodine would be absorbed in the water and would give a concentration of about 1.2 x 10-6 pc/cm of Iodine in the 3
. es c 43 Bulk Shielding Tank water. This is well below the concentration estimated for one ruptured fuel element in the Illinois Advinced TRIGA.
The gaseous fission product release for a whole core rupture would give an air concentration in the reactor laboratory of 1.2 x 10-6 pc/cm or a dose rate of 6 x 10-3 mRAr.
3 Again the concentrations are much less than the estimations for one ruptured fuel element in the Illinois Advanced TRIGA.
The numbers above are based on Section XIV.C.2.d of the " Safety Analysis Report for the Illinois Advanced TRIGA."(4) The consequences of this concentration are also discussed in the above mentioned section and in Section XI.C of the same reference.
The water soluble fission prudcts would be removed by the ion exchange resin of the separate deionization system of the bulk shielding facility.
It is concluded that, even if the remote possibility of an object falling onto the core and damaging the lattice or fuel should occur, the possible changes in reactivity and the possible fission product release would not create an unmanageable hazard.
XIV.B PERSON FALLING INTO BULK SHIELDING TANK The likelihood of a person inadvertently falling into the bulk shielding tank is remote since both the reactor deck above the bulk shielding facility and the top of the bulk shielding tank itself are fenced.
Personnel working directly with the facility would generally not be stationed near the edge of the tank or over the water surface during operation of the LOPRA. However, during shutdown conditions personnel may be working on the bridge and near the tank's edge.
It is, therefore, appropriate todaxamine the possible radiation exposure a person could receive by 1) falling into the tank, above the core, during shutdown and 2) falling into the tank, but not over the core, during operation.
I i
, y :ee *.
.r.
44 j,
s During shutdown, the exposure near the surface of the-tank-is not L
significant since the fission product inventory in the core is small'due to
's.
~1ow power operation 'and short period of operation (Section XIV.C.2 reference' 4). ;During operation, say at or below the usual power l'evel of 100 watts,,the radiation. exposure-level, due.mostly to gamma radiation, at or near the surface of the water in the tank would not exceed 50 mR/hr.
If a person would sink to 2 ft. for one minute he would receive a dose of approximately 50mR.
L_____---_---__--__.-.--.
-: - A e #
45 REFERENCES 1.
Facility License R-69 Amendment No. 6.
Also see: P. K. Doshi, " Neutron Pulse Propagation Through Multiplying Media," Ph.D. Thesis, N.E. Program, U. of Ill. (1968).
2.
Facility License R-69 Amendment No. 4 (Jan. 7,1964).
3.
Facility 71 cense R-69 Change No. 3 (May 25, 1966). Also see: H. Hassan,
" Experimental and Theoretical Studies of Space Time Nuclear Reactor Kinetics," Ph.D. Thesis, NE Program, U. of Ill. (1969).
4.
" Safety Analysis Report for the Illinois Advanced TRIGA," University of Illinois (Aug. 1967).
5.
Hosenkamp, A., " Final Safety Analysis: Annular Core Pulse Reactor,"
Sandia Corporation SC-RR-66-2609 (Nov. 1966).
6.
" Fuel Demonstration Test," General Atomics Report GACD-7438, General Atomic Division of General Dynamics Corp. (Sept. 1964).
7.
" Technical Specifications for the Illinois Advanced TRIGA Reactor,"
License No. R-115 (June 25,1969) Appendix A, Section 2.1, p. 4.
8.
" Proposed Amendment, Utilization Facility License Number R-69," (June 3, 1963), pp. 8 and Appendix C (Amendment No. 3 received on August 22, 1963).
f.,- _ _ - - _ _ _ _ - _ - _ _ _ _ _ _ _.
i e
REPORT ON START-UP OF LOPRA January 18,1972 Appendix A
~ *
.. January 19, 1972 Section'I INITIAL LOADING The loading of the LOPRA was started at 10:00 a.m. on December 28, l
1971. The loading was carried out under the supervision of the LOPRA Supervisor--Orville Nhipple; Reactor Health Physicist--Paul Hesselman; and' Reactor Supervisor--Gerald Beck.
Gary Thayer (Licensed LOPRA Qpera-l-
tor), Hernan Carvajal, and Harold Keiser assisted in the loading. The loading was carried.out according to the written Initial Loading Pro-cedures, with the exception that loading number 5 in the written procedures was split'into two loadings--one of 5 elements and one of 4 elements.
In step number 13, where a sandia element was substituted for an Al element, the two 1/M measurements with the poison rod withdrawn gave an increased reactivity worth of about 54 Therefore, Sandia elements were.added without first adding an aluminum element in the position.
The LOPRA went critical at 4:58 p.m., December 28, 1971 with a loading of 61 elements--56 aluminum elements and 5 Sandia elements at a poison rod position of 1089. Figure 1 gives the locations of the aluminum and Sandia elements in the final loading.
Table 1 gives the data taken during loading.
Figures 2 and 3 give the 1/M curves generated during loading. Tables 2 and 3 summarize the reactivity worth of the last elements added, and the reactivity worth of the poison control rod at various loadings.
It should be noted that the reactivity worth values are dependent on correct source readings.
+
S K
C A
4 i ii ' 2 !;i' s 4 5 o i 2 3 4 5 G, R
i I
l i
v v
x X
X i
E G
A RO i
T hg iii) :!' ;iI3 4 5 s
,2 3< 5 G e/p o
v V
y i
3"^
00O000000 I
l L
l e
0OO00OO00 r
u 0
~
e 1
6 8@O88@@90 N
M9 w 8@O88@0@8 OC 8 L 0@O8880@9 A'. 7 1,
s
/
AR R m68@O8800@9 MNA _f P
s s
OOH P
f C
C
/e I
s 0@O888089 e
e, O
n 5
m L
e
,e l
e u El 8@O800009 e
4 i
a inh-d l 8@O088080
/
3 4
a o
S T 6 5 00O000000 5
1 2
6 90OO00000
^
8 o
e e
R 1
,l
m 3.
=
G 0
5 2
2 V
0 9
2 1
1 1
A 1
2 2
5
~
TSB t
5 0
9 a
1 1
s t
nu M o
P 42 8453 960 n
57 65 20 C C 46 9900 099 i 09 22 01 A'
1 1 1 1 1
m 1
1 1 1 1 R
5 P
/
O 1
L 4' 77 9
1 11 9 692 095 6401 545 0820 808 8
9 221 01 2 111 1
- 1 1
- 1 11 1 1 L
~
~
1_
A C
I T
I R
1
'C 7
0 3
9 M
0 9
0 1
/
T 1
1 0
l 1
8 iC 2
E A
L O
r B
R e
A P
b G
5 7
T P
m V
9 1
A e
A 2
3 c
.~
S e
el T
D l
N o
E s
M n
E o
3 6
4 R
C 0
9 9
U 2
2 S
t A
a E
M s
t M
n M
/
u P
812 972 0
241 9
9 465 994 l
o C 21 9 007 9 908 9
04 2 495 C
332 332 2 232 2
333 323 5 29 879 9 304 0O 0 4 380 1 3 089 9 87 0 990 1
8 9
01 0 320 322 222 3 223 2 2 333 333 n
n n
w w
w
)
np o
p o
)
o p
1 wU D
U D
s
~1 D
U o
p t
A D. U r
A
(
R R
R R
a
(
R R
s s
t t
n n
d n d n n
u nn S
n n
n o
I oo oo o
O I o I 0 o o
i l R s R s s
s g
1 s
_ s i
e ei n
e i
_i t
ee.i
.i o
i cu o
o o
c co i
c: o d
rFSP SP P
r rP d
r
.P P
u E.
n u
u u
a o
oo o
o o
o C
SN S
S L
SF
- j i 1
]
i 1
ea' 6 5 4 6 4
4 3 6 7 5 0
6 4.
3 9 4
2 7
6.-
L 4
4 4
3 0 9 6 5 0
5 4 M
5, 3
3 0
0 0 0 0.
4 2
1 1
1 1
0 0
/
1 0
0 0
0 0
0 0 0 0 0
0 0 0 0
=
r.
=
G 6
1 8
0 6a 7 7 0 2 4
2 2 3 5 V
8 9
7 8-9 6 8 8
1 5
7 3-0 3 A
1 2
2 6
6m 9 9 4 7 9
7 1
3 2 n
1 1
1 2
2 3 TS B
t 2
2 5
36 4 5 0 7 8 5
8 0 -
4 0
a 9
9 0
1 9 9 0 8 5 3 2
5 4 5 2 1
2 3
76 6 0 9 4 7 9
7 1
2 2
s 1
1 1
1 2
2 3
tn uo C M 6 7 25 37 90 43 3
1 2 0 3
5 9 4
5 P
7 0 87 67 57 71 6 8 8 4 6
7 2 3 4 C
1 2 22 22 66 67 9 9 4 7 9
7 1
3 2 1
1 1
2 2 3 AR PO L
76 60 23 83 53 4 9 1
7 4
4 6-9 9 68 91 95 32 90 3 0 0 5 7
8 2 2 3 1 1 23 22 67 67 9 0 5 6 9
7 1
3 2 1
1 1
1 2
0=
5 7 I
5 0
7 1
8 1
5 0 8 3
9 0
3 5 3=
R 1
4 7
4 6
4 2
6 4 5
3 2
1 C 7 M
6 3
3 1
0 0 0
0=
0 0
0 1
1 1
1 9
/
O 1
1 0
0 0
0 0
0 0 0 0 0
0 0
0 T
1 l
8 i
E C 2 i
!l}
L A
0 0
B O r 1
6 4 3 8 6 8
0 5:
A R
e G
6 7
7 3
8 4 0 5 3 1
7 3
4 7
T P b V
5 9
4 8
9 4 8 8 0 9
4 8 =.
5 8 P
m A
4 7
8 1
1 2
2 4 6 1
7 9
2 8 A e e
1 1
c l
=
S e o
}
T D s
0b:
N n
E o
9 0
2 9 1
1 6
0 0 M
C 2
5 0
2 1
2 5 4 3 9
2 4.
5 9 E
2 1
6 8
0 4 7 7 0 8
6 9-6 6 R
t 4
8 8
1 2
2 2 4 6 1
7 9 U
a 2 8 1
1 S
=
A s
E t
M nu M 79 1 1 3 5 2 2 4
1 9
0 0 M
o P 84 36 28 50 90 3 4 9 3 1
5 3-8 4
/
C C 76 88 1 2 88 90 4 8 8 0 9
3 7 5
3 1
44 77 88 1 1 12 2 2 4 6 1
7h.
2 8
1 1
=
==
9I=
94 27 6 6 0 6 3
0 0
80 76 42 96 39 7 0 4 4 4
3 2 8
9 74 27 58 78 99 4 8 9 0 9
4 8-3 7
44 87 88 1 1 11 2 2 4 6 1
7 2
8 9-1 1
n n
n n
n w
w n
w w
w p
o p
o p
w o p p_
o p-o p
U D
U D
U o
p_
D U U_
D U-:
D U
D U
.=
n R
R R
R R
R _.
R R wR R
R R R R o
n n
n n
n n n D g n n n n o
0 o o
o o
n n 9 o o o 2 o o 5 o o 0 s 3 s s
s s
o o 4 s s ss 5 s s 5 s s 0
2i i
i 4i i
s s i i di ii i i o
o o o
- o o o oo o o o
o i i. :
.P
.P P
.P P
o o
.P P RP
.P P
.P P
E.
E.
. E.
P P_ E.
E.
E.
F S
,F F
F F
F i
3 9 2 9 2
0 2
6 8 7 8
8 _-
3
/,
G 1
2 8 8 0
2 3
1 5 3 9
9 3
V 6 0 7 0 2
4 8
6 5 5 8
0 5
A 2
4-2 4 3 5 3
7 4 3 5
7 4_
1 4
TS B
4 4
4 0
3 95 7
4 5 7
2 4
69 8
t 6 0 3
3 5
4 8 7
8 8
5 6 4
a 2 4 5
1 44 s
tnu 6 3 0 9 6 6 2
7 0 9 8
92 1
oM 1
1 5 2 4
6 3
0 4 6 7
08 2
CP 6
1 7
1 2
4 8
6 6 6 8
95 5
- C 2
4 2 4 3 5 3
7_
4 3 5
1 7 7
1 44 AR PO 3 0 5 9 8 5 1
5 6 3 58 58 1
L 3 2 1
4 5 9 3
2 0 2 60 20 9
6 9 8 0 1
1 8
6 6
1 80 26 5
2 3-2 4 3 5 3
7 4 3 56 56 7
L 1
34 AC I
6 0
6 8 8
T 9 2 0
1 9
3 4
5 6 8 8 7 2
I 9 2 0 2 5
8 2
5 9 2 6 0 5
R 1
1 1
2 1
1 0
1 0
0 0 0 0 0
C 7 M
0
- 0. _.
0 0 0
0 0
0 0 0 0 0 0
9
/
)
1 1
0 0 I
1
- I li 8 E C 2 L A 0 7 3
B O r 0 0 0 0 0
0 0
0 0 0 1
3 6
A R e
G 0 9 2 8 4
6 2
6 3 0 2 0 0
T P b V
8 0
7 2 5
1 7
4 5 9 3 8 7
P m
A 4 4 4 4 8
5 3
3 0
1 4
A e e
1 2
1 2
1 3
2 5
3 0 3
5 c
l 1
S e o{
l T D s
N n
E o
0 0
0 0
0 0
0 M
C 8
5 2
0 9
2 7
E 5
2 5
9 3
3 8
R t
4 5
3 1
3 8
6 U
a 1
3 5
0 4
3 5
S 1
A s
E t
M nuM 0 0 0 0 0 0 0 0 0 0 0
0 0
M oP 4
1 9 4 4
0 1
0 5 8 4
9 9
/
CC 9 3.
6 3 5
1 5 0 5 9 2
0 8
1 4
4.
4 4 8 5 3 3 0
1 3
8 6
1 2.
1 2
1 3
2 5 3 0 4
3 5
1
=.
0 0.
0 0 0 00 0 00 0 0 00 00 0
8 8
4 3 4 94 3 20 1
5 87 68 3
8 8
7 2 5
21 9 74 5 2 1 6 33 4
4 3 4
4 8
4 5 3
1 3 0
1 33 78 7
1 2
1 2.
1 33 2
55_
3 0 44 33 5
1
=
m m.
n-n n
n n
n n
w.
w w
w w
w w
D U=
o p o
p.
o p
o p o p o
p o
.=
U-D D U D U D U D
U D
R. R.-
R R
R R R R R R R
R R
n nn n
n-n n n n n n n
n n
o 6 o o 6 o o 7 o o 8 o o 9 o o 0 o o
1 o i
5 s s 5 s s 5 s s 5 s s 5 s s 6 s s
6 s t
i i i i i i i i i i i
i i
o o o o i
o o o o o o o
o d
.P P
.P P
.P P
.P P
.P P
.P P
.P E.
E.
E.
E.
n E
E.
E.
o C
F
.F F
F
,F F
F i
GV n
A
A i
s m
T 5
S
/
B 6
5 7
4 t
2 9
a 1
5 s
tnu 90 oM 63 CP 22 n
C 1 1 i
m AR 5
P
/
O 00 5 L
48 9 32 0 1 1 6
L AC I
N T
W I
1 O
R 7 D
C 9 M
T 1
/
U O
1 I
l T
S 1
8 i
2 R
l E C E
L A r T
B O e F
A R b G
A T P m
V P
e A
S
~A c
G e
e N
S D l
I T
o D
N s
A E
n E
M o
R E
C RU t
S a
A E
s M
tn M
uM
/
oP 1
CC n
n w
w) o p
o1 D U
D -A s( R R
donn n
Ri o o
s s
n yei i
o 1 t co o
i 6 erP P
t f u ao i
d
.SS E.
no C
F t
g.
y.
n-
'.O-
- c..
. e.
' O.
O.
. E.
L c.
V G.
g
-.e.
o N k.
o t.o.
r
.7 o
- k.;.t.
o..
.a 1x6 7.!
u.:
w b%
cs 2
k
- 4 1.M 4
4 q
z q
s g, -
.4 6
s.
3- ~
4; y
p? N
,o M - s N.
L[t. '
~.,
4 o
c n
W, O
6 s.
- V) w m
o s
m n
k Q% W
- b. -
0 N
5 Q
ox o
.w t e
m I
g-.
o
.o 3
C Of A Q N
O.
N O-U N
o 4.
9 k
o v -
'4 e
n 3TY ow 4
e 4
I tv J
\\
l O %
D j
g 1
4 W /R
-__ ____ ______- _ : D
- 4 ~
.. 8_
iY
'D.
- _J.
@ ~
.y p
gg i
- t >
'o e-
- y T'
'E g
t Q'
r 3
4 1
.'s o
.b.
E t
'4 g
e
- n M.
- ..O
~k
,8 -
.j 4
i e
0-t o>
h.
Q w.C 1
4 9
4
~t~
E E4 b
k.
4 2
E
'E
. lo.
s e
m e.
t.
9 g
-t o
o g
a w
' ty fy.>%
~
'54
-.3 9
se g
3 o#
g-C'
'O N
ahs i
w-a 4
3-
.o s
w o
4
=
.s a
y n.
<4 QM 3
..:f v
Cs o
tQ N-'-
e
-- kv *,
A k x w w
[T M
=n st}
l O st O'
1 4
q m
C'
-.D.,
0.-
Cl>
r.-
A.
w r.
m.
e4 7
___m__.__________m_
bM O.._
)
0 3
4 0
8 7
1 d
n 7
3 6
5 6
5 7
o D R
0 0
0 0
0 0
0 k
F o B s 5
n 3
5 8
8 5
6 Ti p
7 0
7 6
7 6
S o U BP 0
0 0
0 0
0 4
9 1
6 8
8 9
2 Fd n
B o D 4
0 5
4 3
3 2
R 0
0 0
0 0
0 0
e l n oo 4
s s 8
1 1
9 6
9 ni p 4
0 5
3 2
3 oo U CP 0
0 0
0 0
0 0
0 1
4 7
1 2
9 7
5 2
4 5
4 4
3 A
n 0
0 0
0 0
0 0
R d D 0
0 0
0 0
0 0
P o
O l f L
F B n 5
O o
3 4
7 0
5 8
T s
5 0
5 5
5 4
Ti p
0 0
0 0
0 0
D S o U E
BP 0
0 0
0 0
0 D
K D
4 6
A A
6 1
1 5
7 8
6 3
0 4
3 2
2 1
S 0
0 0
0 0
0 0
T n
0 0
0 0
0 0
0 N
F d D E
B o M
R E
e 2
L l n 4
6 2
0 E
o o 5
1 7
8 6
1 E
s s 3
0 3
2 2
2 L
T ni p
0 0
0 0
0 0
B S
oo U A
A CP 0
0 0
0 0
0 T
L F
0 4
3 9
2 1
9 0
3 8
5 1
6 1
7 li n 4 3
3 3
2 2
1 T
d D R
0 0
0 0
0 0
0 o
O ll W
F B n 5
Y o
4 6
2 5
5 0
1 3
T s
9 3
3 7
2 7
2 3
I Ti p 2 2
2 1
1 0
0 1
V SS o U 0
0 0
0 0
0 0
0 I
EB P T
U C
L A
A E
V I
R 6
5 9
0 9
4 6
8 2
M 3
9 0
5 2
9 6
5
/
n 2 1
2 1
1 0
0 0
1 F D
Bd 0
0 0
0 0
0 0
0 o
R e
l n 6
8 8
oo 7
2 1
3 5
8 7
s s 5
2 2
8 5
2 0
ni p 1 1
1 0
0 0
0 oo U CP 0
0 0
0 0
0 0
t S
S S
S S
S n
I 2
3 4
S S
e 3
m l
l l
l l
1 1
1 7
e A
A A
A A
A A
A 0
l 5
6 5
5 5
5 5
6 0
E
.o 5
5 5
5 5
5 5
5 l N
=
e u
5 6
6 7
8 9
0 1
8 F
5 5
5 5
5 5
6 6
l1'
'f 1 1 TABLE 3 POISON R0D REACTIVITY WORTHS DURING INITIAL LOADING S'=.0073 1/M VALUES AK Fuel Elements Console BF BST BF Poison Rod
-Poison Rod Console BST Console BST No Up Dn Up Dn 55, 55 Al
.0157
.0235
.0294
.0434
.0078
.0140 1.07 1.92 56, 56 Al
.0122
.0199
.0236
.0383
.0077
.0147 1.05 2.01 56, 35 Al IS
.0121
.0200
.0232
.0359
.0079
.0127 1.08 1.74 57, 55 Al 2S
.00836
.0159
.0175
.0312
.0075
.0137 1.04 1.88 58, 55 Al 3S
.0055
.0124
.0125
.0261
.0069
.0136-0.95 1.86 59, 55 A1 4S
.00288
.00966
.0070 0219
.0068
.0149 0.93 2.04 60, 55 A1 SS
.00078
.0068
.00215
.0170
.00602
.0149 0.82 2.03 61, 56 A1 SS
.0052
.0133
.0052*
.0133*
0.71*
1.82*
- Reactivity worth of poison rod below critical position. Total reactivity equals this plus 20.34
.__________a
g;...
~
b,o u.
1 Section II P'oison Rod Cal'ibration The. reactivity worth' of the poison rod was measured according to the' written procedures. The' critical position was found and the remaining rod' divided into five parts. The reactivity worth of the-parts was 'then measur'ed by use of positive periods.- Negative periods
. were measured within the limits ' of the Inhour curve, which was used to find the reactivity worths for the 'various periods. All poison-
[
rod positions correspond to 0000 starting position..This measurement was' done twice, with different excess reactivities in. LOPRA.
The-
' change in excess reactivity came from the' movement of the compensated ion chamber during power calibration.
The results are summarized'in-Table 4.and 5.
The rod worth curve is given in Figure 4.
' The. amount of reactivity worth that could be measured on the poison rod was 424 and' accounted for only the upper part of. the poison rod travel.
Extrapolations of this reactivity worth to the total worth of the poison rod was done by comparison with the rod worth curves for,the adjustable transient rod on the Illinois Advanced TRIGA.
Four cases were examined:
Case la.
Worth. curve of adjustable. transient with' fast transient rod up; Poison rod worth from 940-1480 Case lb.-
North curve of adjustable transient with fast transient' rod down; Poison rod worth from 940-1480
. Case 2a.
Worth curve of adjustable transient with fast transient rod up; Pois,on rod worth from 940-1380 Case 2b.
Worth curve of adjustable transient with fast transient rod down; Poison rod worth from 940-1380.
' Cases 2a and 2b were examined because the poison rod position of 1380 corresponds to the full out position of the adjustable transient rod.
Table 6 summarizes these cases.
It is seen from these extrapolations that the poison rod reactivity worth, given by this method, is about
$2,00.
i
TABLE 4.
POISON CONTROL ROD REACTIVITY WORTH (Raw Data)
Rod Position Increment Period -(sec)
W>rth (c)
Incremental Worth (c)
Previous to moving Chamber 1089
=
+80
+6.2 1169 174
+6.2
+80
+5.8 1249 77.8
+12.0
+80
+4.0 1329 51.8
+16.0 l
+80
+2.8 1409 40.7
+18.8
+71
+1.5 1480 36.2
+20,3 1100
=
-60
-5.5 1040 275
-5.5
-60
-8.5 980 140
-14.0
-40
-8.0 940 109.6
-22.0 After moving Ion Chamber 1024
=
+86
+8.74 1110 117
+8.74
+90
+7.44 1200 51.0
+16.18
+90
+5.41 1290 32.6
+21.59
+90
+3.59 1380 25.1 25.18
+100
+2.17 1480 21.55 27.35
13_.
Table 5 Poison Control Rod Reactivity Worth composite Rod Positiona
. Incremental Position Reactivity. Worth-Incremental Worth 940.
0 l
40 8.0c 980
- 8. 0c 44 8.0c 1024 16.OC 6
0.5C 1040 16.50 50 5.5C 1090 22.0c 20 2.7C 1110 24.7C 40 3.50 1170 28.2C 30 3.90 1200 32.1C 50 1.90 1250 34.0c 40 2.5C 1290 36.5C 40 1.5C 1330 38.0c 50 2.1C 1380 40.1C 30 0.7C 1410 40.8C 70 1.5C 1480 42.3C
________--__w
--..---.-,.--,-.,.,..------.-.--.-.---,._,--7_-.
C 0
h O
h s-q
.x -
h h-u s
s V
M b
V j
w 4
r e
-o e
e m
- ^
r Ve t-e G
QH l
,go a
~
r.
v 2
r t.
~~
E v
n
{
E A
-e s
n
- t 3 0
.e o
3 i
s+
2 s
x I,
z.
8 a
s V
c
'h
[s IV q
U w
w T
c:-
4 g
d 4
a N
D b
k e
v s
v 6
0
.T T
d k
W-w A
w
.t u
e J
+
6 o
N-g y
(
4 J
n v
w 3
q 4,o m
t 4.
. k.
k 3
W D
~
4 c
c
.c
.g 4
.,M o
""1; 6
T o
o
(
t O
N4
~
N 2
e 2
o e'
O 4
d.
o 8s Dw
.y 9
5:.
e.
e_
o_
o_
m L
TABLE 6 EXTRAPOLATION OF POSION R0D REACTIVITY WORTH USING ADJUSTABLE TRANSIENT WORTH CURVE
. Case l' Poison rod worth in the interval 940-1480 = 424 Or 36% of upper portion of poison control rod = 424 la.
Adjustable transient worth $2.35 Upper 36% equals worth from 626 to top or $1.93 to $2.35 Increment worth is 424 Extrapolation gives total poison rod worth of $2.35 lb. ' Adjustable transient worth $2.02 Upper 36% equals worth from 626 to top or $1.63 to $2.02 Increment worth is 394 Extrapolation gives total poison rod worth of $2.18 Case 2 Poison rod worth in the interval 940-1380 = 404 Or 32% of upper portion of poison control rod = 404 2a. -Adjustable transient. worth $2.35 Upper 32% equals worth from 662 to top or $2.03 to $2.35 Incremental worth is 324 Extrapolation gives total poison rod worth of $2.95 2b.
Adjustable transient worth $2.02 Upper 32% equals worth from 662 to top or $1.72 to $2.02 Incremental worth is 304 Extrapolation gives total poison rod worth of $2.71 1
Section III i
Power Level Determination Three methods of determining the power level for a given Keithley reading were used. The first methcd investigated was the power level of the subcritical multiplication of the source.
Using the rod worth curve for the poison rod (Fig. 4) the LOPRA was made suberitical by various amounts. The Keithley reading was recorded.
These values were then compared to the curve of the power level suberitically of the Illinois Advanced TRIGA (Fig. 5).
This curve was then vs.
used to calibrate the Keithley reading to Power level. The data is summarized in Table 7.
It was noted that the power increased linearly when LOPRA was just critical with a source, and from experience with the Advanced TRIGA,'the rate of power increase was put at.03 Watt / min.
The Keithley reading was increasing linearly at a rate of 1 x 10' amp / min.
Thus, it was assumed that 1 x 10' amp equals
.03 Watt.
This compares with the value of 1.8 x 10' amp equal to.03 Watt found from the suberitical multiplication.
The compensated ion chamber was then reset so that 1 x 10- amp was equal to 1 Watt. The source multiplication numbers were used as the basis for this.
It was noted that the compensated ion chamber had a reactivity worth of a
-8C when it was completely down.
The Y - dose rate at the water surface was checked at a LOPRA power level of 20 Watts, as given by the final compensated ion chamber' position.
The rate was found to be 5 mr/hr, compared to 4.8 mr/hr. given in the LOPRA SAR.
The 2f-monitor read Imr/hr, compared to 2.4 mr/hr. given in the SAR.
The last method used to check power level was to increase the LOPRA power until temperature feedback became observable. The positive reactivity added, by the poison rod, to compensate for the negative temperature feedback was recorded for three LOPRA power levels above 1 kW.
This was then compared to a similar curve for the Illinois Advance TRIGA and the Illinois Mark II TRIGA. (Fig. 6)
The LOPRA power level was determined by using the lf-monitor value of 50 mr/hr I
per kW.
The Keithley reading was also recorded but not used for power level determination. The results are given in table 8 and Fig. 6.
n n a;
.a
. -, 372. __
+e, v
Ylg u. re E
.gy.
. Po we r Le ve'). Vs.
A mo u. g,t
' Sc.< b c r]/se a /.
...gs fa r - EUhoir A dvance d 78 E (> A
,te; fd
.38
.. 98
- O
.,99
. i1
...06.
b'
^
.,s
~.a
.;.'.v
'v.
.ss 4
o A'
.It
.L M...I(
y o
A..io
-.ov
.06
.07 06
.oS
..oV
..e3 i
- o2 n
Q
.Q' h
Q
/O
/2 lY lh lS SO
$Y L h-gL~ DnL 0 can
Table 7 LOPRA Power Level Due to Soure Multiplication g
LOPRA Suberiticallity Keithley Reading
' Corresponding Advanced TRIGA power level (Fig.,)
~
10 C 2.5 x 10 amp
.027 W Source change
-8 20 C 1.18 x 10 amp
.005 W
~
10 C 1.8 x 10 amp
.027 7
-8 4 C 4.1 x 10 amp
.08 W
~
2.0c 6.9 x 10 amp
.12 W Reset Compensated lon Chember
- 2. 2 x 10 amp
.105 W 3 C
~
l.50 3.6 x 10 amp
.2 W
Reset Compensated Ion Chamber
-O 10 C 3.0 x 10 amp
.027 W
]
+
. TABLE 8 4
i REACTIVITY LOSS Vs. POWER LEVEL Advanced TRIGA MARK II TRIGA Power Level Power Level LOPRA y-Monitor LOPRA Keithley Reactivity Loss (Fig. 6
)
(Fig. 6
)
Power Level Power Level 4.44 1.55kw 2.7kw 2kw 2kw 4.84 1.80kw 3.05kw 2kw 2kw 8.0c 4.2kw 5.6kw 4kw Skw 11.84 7.5kw 8.6kw 6kw 7.6kw
(
.-- - - - - - - - - - - - - - - - - - - - =. - - -
O c:
-2 0 -.
fre u rc 6 n
Power Leva / 6. 1%ehuily L,.s.g
.ii
, >< - r/ Moi.s /) d uc n eed irrI& A.
a o - E th w,s A rk x rir n A e - LO PR A (6->nons%t).
.fo
{
a-LoPR A (keilh ky).
9 g~
e
.O O
h
^
h M.
f c7
=
k o
s V
u p
e S
oi t
o 4
m 4
- v w.
.3 5
x 4
W' O
g
.q.
2 7
/
/
2 3
Y S
6 7
8 9
Power Level (kw)
Section IV I
- Rod Drop Measurement of Safety Rod Reactivity Worths.
The LOPRA was leveled off at a power level of 9W.
A safety rod was then dropped into the core. The ratio of the-power level 15 sec. after drop to the-initial power level was found. This value was' compared with the 18sec, curve of power ratios vs. reactivity insertion, generated on the Illinois Advanced TRIGA'(Fig.'7).
Comparing the 15 second re.tios.for LOPRA with the 18 second ratios for the Illinois Advanced TRIGA, it is seen that the safety rod reactivity worths, as measured.by this method, are at least $4.20 for safetry rod #1 and
$3.75 for safety rod #2.
Table 9 gives the data collected in this measurement.
ah m.-n isrr11amms - miie a
s1-i i'i -
sr-
..__,__s.,__
O f TABLE 9 DATA FOR ROD' DROP MEASUREMENT OF SAFETY ROD REACTIVITY WORTHS
~
Initial Power 15 sec.
Reactivity Worth on 7
Safety Rod Number Power After Drop Ratio 18 sec. TRIGA Curve I
9W
.38h
.0425
,$4.20 2
9W
.42W
.0494
$3.75 l
l 1
I C________________
l 25 i
- end Fi
- u. r e -7 9
s Power (T o.ho. Vs. Neg q [: ve R ea c].; u ; / y _ m a, f;,
No r
,eZ2 l
Z/hao).s
/Z duca nc e d TRE G A.
.ozo Six sae nds af}er ' drop.
e-p 1-o - %elvc second., eller d rap..
,os a - Eig h-lee n see.n ds efler dn
.osk 4 - Twenly A u r Secon k aFle, d, e-
.D
'N
.c W-
.o' q i
y.
-S O
o
. oit.
o
'i-
.d Q
.oso D
g o
6 D
w 9
_(O 008 A 4 0
0 8'
.en a
o o
o a
O b
O h
IQ -
-oot p
I8 s ea-
.ooZ 2 'I.see '
I.o.
- s. s 20 2.5 3.o 3.s go ys s.o g,,
@~ A c L, 9
Au~
en on-a
f <.
1 Section V
-l 1/M MEASUREMENTS OF' POISON ROD AND SAFETY RODS REACTIVITY WORTHS
- 1/M measurements in LOPRA were used to determine the reactivity worth l-of the poison rod and the safety rods.
The value of the source used in the initial loading was the source value for these measurements. The various configurations measured and the 1/M values are given in Table 12..The reactivity worths calculated from the above measurements 'are given in Table 11. The total worth of the poison rod with the safety rods up is found by adding the excess reactivity in the assembly to the negative reactivity 1
worth found from the 1/M measurements.
Another value for the source was found using the data collected from the power calibration.
The source was found by extrapolation of the data where power level vs. small negative reactivities in LOPRA was measured.
This source value gave rod reactivity worths about 40% higher than the worths reported here.
, TABLE 10 CONFIGURATIONS AND 1/M VALUES FOR POISON ROD AND SAFETY ROD REACTIVITY WORTHS 8 =~.0073 Source = 295 Counts / min.
.' Configuration Counts / min.
1/M Suberiticallity of LOPRA All rods in 4617
.06389
$8.75 Safety Rod #1 Up
.10360
.02847
$3.90
' Safety Rod #2 Up 9160
.03220
$4.41 Poison Rod Up 5198
.0568
$7.78
' Safety Rod #1 52560~
.005612
$0.77 and #2 Up l
['
' ei.-
TABLE 11 ROD REACTIVITY WORTilS S =.0073 Source = 295 counts / min Rod Reactivity Worth t-Negative portion of poison rod
$0.77 Safety Rods out
[
Total poison rod
$0.97 Safety rods out
' Total poison rod
$0.97 Safety rods in Safety rod #1
$4.85 Safety rod #2 and poison rod in Safe ty rod #2
$4.34 Safety rod #1 and poison rod in Gafety rod #1 and #2
$7.78 Poison rod in All rods added separately
$10.16 Total negative worth of all rods in
$8.75
+
.Section VI COUPLING OF LOPRA WITil THE ILLINOIS ADVANCED TRIGA i
The critical rod position, at power 1cvel of 0.1 W, for the LOPRA was determined with the TRIGA shutdown. The poison rod of the LOPRA was inserted and the TRIGA was brought to a power level of 15 W.
A power indication of 0.002 W was noted in the LOPRA under these conditions. The LOPRA was then brought to a power level of 1.0 W, at which time a possible slight increase in the TRIGA power was noted.
For the level LOPRA power of 1.0 W the same LOPRA poison rod position occurred as the previous position of 0.1 W.
The TRIGA power was increased to 1 kW and a nearly linear increase in power was noted in the LOPRA. The LOPRA poison rod was then inserted until the LOPRA was approximately 54 suberitical. The resulting power level in the LOPRA vas noted and the power then increased to 10 kW.
Because of the long time necessary for the LOPRA power level to come to equilibrium at 54 suberitical, the poison rod was inserted so that LOPRA was 194 subcritical and the experiment continued. The results are given in Table 12.
The LOPRA power levels are approximate since time was not allowed for the LOPRA power to level off and the asympotic LOPRA power level was estimated.
The value of.0164 for tle coupling coefficient found from these measure-ments (Table 12), compares with a value of 0.104 used in the calculation for the graphs on page 14 of the LOPRA SAR. Thus the SAR graph will over estimate the LOPRA power levels from TRIGA operation, by a factor of approxi-mately 6.
The graph on page 15 of the LOPRA SAR for peak pulsed power in LOPM will also be a factor of 6 high. Also, there is a finite time (seconds) needed for LOPRA to come to equilibrium which was not accounted for in the SAR, which would lower the peak power in LOPRA during a pulse.
Thus the pulse characteristics of LOPRA should be conservatively estimated in the LOPRA SAR.
.t.
LORPA Power TRIGA Power LOPRA Suberiticallity IW 15.W 0
Rising linearly 1 kW 0
.024 4W 1 kW 54
.0154 30W 10 kW 54
.016&
85W 100 kW 194
.0164 165W 200 kW 194
.0164 250W 300 kW 194
.0154 310W 400 kW 194 i
f i
4 i
UNIVERSITY OF ILLINOIS i
REPORT OF THE COMPTROL ER YEAR ENDED JUNE 30,1988 CRAIG S. BAZZANI, coMPTRottte l
l l
l E__________________________-___
,v.
i t
UN1VERSITY OF ILLiNOfS i
IhI
= %p. p -
r
%_. 4 REPORT OF THE COMPTROLLER YEAR ENDED JUNE 30, 1988 CRAIG S. BAZZANI, COMPTROLLER PUBLISHED BY THE UNIVERSITY OF ILLINOIS URBANA, ILLINOIS 1988
THE BOARD OF TRUSTEES MEMBER EX OFFICIO The Governor of Illinois
' Honorable James R. Thompson.
Springfield j
ELECTED MEMBERS Term (1983-89)
William D. Forsyth, Jr.
Springfield George W.
Howard III
.Mt. Vernon Albert N. Logan.
Chicago Term (19d5-91)
Susan L. Oravenhorst Lake Forest Ralph C. Bahn..
Springfield Ann E. Smith Chicago Term (1987-93)
Judith A. Calder Chicago Nina T. Shepherd
.Winnetka Char.1.es P. Wolff Chicago STUDENT REPRESENTATIVES Robert S. Wylie.
Urbana-Champaign Campus James L, Evenson Chicago Campus k
J l
OFFICERS George W.
Howard III President Earl W.
Porter Secretary i
Craig S. Bassani Comptroller Treasurer l
Bernard T. Wall.
Byron H. Higgins University Counsel
}
~ADMINISTRATIVE OFFICERS OF THE UNIVERSITY OF ILLINOIS q
l Stanley O.
Ikenberry President Craig S. Bassani Vice President for Business and Finance Richard L. Margison.
Associate Vice President for Business and Finance Richard O. Traver.
Director of University Audits Michael B. Provenzano.
. Assistant Vice President for Business Affairs at Chicago Harold G.
Poindexter Assistant Vice President for Business Affairs at Urbana-Champaign I
l
UNIVERSITY OF ILLINOIS OFFICE oF Vice President for Business and Finance, Comptroller CHIC AG O URBAN A. CH AMPAIGN 349 Administration Budderig - 506 South Wright Street Urbana,litenois 61801 President Stanley O. Ikenberry and The Board of Trustees University of Illinois I am pleased to transmit the Annual Report of the Comptroller of the University of Illinois for the fiscal year ended June 30, 1988. This report is supplemented by the Annual Report of the University of Illinois Auxiliary Facilities System, the Annual Report of the Construction Engi-neering Research Laboratory, and the Annual Report of the Willard Airport Facility, which are issued under separate cover.
The year 1987-88 marks the 120th year of the operation of the Uni-versity.
Prior to 1911, statements of the financial operations appeared only in the proceedings of The Board of Trustees which since 1909 have contained the annual and biennial budgets.
Since July 1, 1911, separate reports have been published showing the financial operations of each year.
These reports are intended to form a comprehensive and permanent record of the finances of the University for the periods covered for the information and reference of all persons concerned or interested.
The financial statements of the University for the past year have been examined by Grant Thornton, Certified Public Accountants, and their report follows.
Grant Thornton has also prepared a report for the year ended June 30, 1988 containing special data requested by the Auditor Gen-eral of the State of Illinois and another report covering their audit of the compliance of ths University with applicable state and federal laws and regulations for the two years ended June 30, 1988.
These reports are not contained herein and are primarily for the use of the State Auditor General and federal agencies.
Respectfully submitted,
)
jf v. /Vyf Craig S. Bazzani Vice President fot Business and Finance, Comptroller 2
l 1
l l
TABLE OF CONTENTS Page 2
Letter of Transmittal.
Report of Independent Certified Public Accountants.
3 4
Balance Sheets.
Statement of Changes in Fund Balances (Deficit) 6 Statement of Current Funds Revenues, Expenditures 10 and Other Changes.............
Notes to Financial etatements 12 l
f.......
600 One Prudential Plaza 130 E.Randolph Dnve -
o:
Chica$o,IL 606016145 f
y.'
312 8 6 0200 i
.i
' REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS j
.i e
l GrantThomtonS i Accountants and Management Consultants l
The U S. Member Iltm of Grant Tho: nton international '
The Honorable Robert G. Cronson Auditor General, State of' Illinois and-The Board of Trustees University of Illinois As Special Assistant Auditors for the Auditor General, State of Illinois, we have audited the accompanying balance sheets of. the University of Illinois (University) as of June 30, 1988 and 1987, and the related statement of changes in fund balances (deficit) and the statement of current funds revenues, expend-itures and other changet for the year ended. June 30, 1988.
These ~ financial statements are the responsibility of the University's management.
Our respon-sibility is to express an opinion on these financial statements based on our audits.
We conducted our audits in accordance with generally accepted auditing standards ' and the " Standards for Audits of Governmental Organizations, Pro-grams, = Activities and Functions" issued by the Comptroller General of the United States' Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement.
An audit includes examining, on a test basis, evidvnce supporting the amounts and disclosures in the financial statements.
An aidit also includes ' assessing the accounting principles used and significant esti-mates made by management, as well as evaluating the overall financial state nent presentation.
We believe that our audits provide a reasonable basis for our opinion.
We previously audited the financial statements of the University as of June 30, 1987 and for the year then ended, from which the accompanying comparative totals for 1987 were derived.
In our opinion, the financial r.tatements referred to above present fairly, in all material respects, the financial position of the University at Junt 30, 1988 and 1987, and the changes in fund balances (deficit) and current funds revenues, expenditures and other changes for the year ended June 30,198E, in conformity with generally accepted accounting principles.
T
~
Chicago, Illinois November 3, 1988 3
=
l 1
o UNIT'ERSITY OF ILLINOIS BALANCE SHEETS JUNE 30,1988 AND 1987 ASSETS l
1988 1987 Current funds:
Unrestricted -
Assets held by State Treasurer - University Income Fund 8
17,893,340 15,341,462 Claim on essh and pooled investments.
17,643,927 15,889,847 Investments,
30,537,525 16,129,694
'l Accrued investment income.
540,410 386,063 i
Receivable from State of Illinois General Revenue Fund.
9,402,778 10,075,801 J
Accounts receivable (less allowance for doubtful accounts of I
$110,256,000 in 1988 and $107,000,000 in 1987)
L3,179,617 57,617,654 l
Inventories and deferred charges.
22,541,011 22,739,643
]
l Total unrestricted.
163,738,608 138,180,164 Restricted -
Claim on cash and pooled investments, 31,678,240 23.172,024 Investments 13,634,543 17,697,739 Accrued investment income 586,215 829,667 Accounts receivable (less allowance for doubtful accounts of I
$14,832,000 in 1988 and $16,850,000 in 1987) 39,838,157 39,137,035 Inventories.,
350,247 12,171 Total restricted.
86.087,402 81,048.636 Total current funds.
$ 249,826,010
$ 219,228,8_00_
Loan funds:
Clain on cash and pooled investments.
4,421,844 0
5,142,766 Investments.
103,031 469,846 Accrued investment income.
33,788 31,739 Notes receivable (less allowance for doubtful notes of
$5,332,000 in 1988 and $5,640,000 in 1987) 29,364,681 26,578,085 Other assets.
69,100 69,100 Total loan funds 8
34,082,444 32.291,536 Endowment and similar funds:
Claim on cash
$1,412 245,231 Investments 34,609,142 2J.979,713 Real estate and farm properties 5,724,267 5,723,562 Accrued investment income 993 United States land grant fund assumed by State of Illinois.
649,013 642,013 Total endowment and similar funds.
41,034,827 8
36,597,519 Plant funds:
Claim on cash and pooled investments, 17,735,075 17,448,633 Investments 49,160,899 84,632,126 Accounts receivable 1,000,376 Accrued investment income 890,439 1,605,608 Prepaid expense,
13,320,000 14,800,000 Investment in plant -
L and.
37,170,699 32,728,325 Buildinsa 802.976,931 777,207,759 Improvements other than buildings 80,547,234 78,094,982 Equipment 711,502,985 643,785,269 Construction in progress.
93,242,933 41,106,840 Total plant funds.
$1,807,556,571
$1.691,409,542 Agency funds; Claim on cash and pooled investments.
S 1,955,486 3,854,989 See accompanying notes to finencial statements.
4
,e
[C LIABILITIES AND FUND BALANCES (Deficit) 1988 1987 Current funds:
Unrestricted -
Accounts payable.
29,682,873 28,085,881 35,613,987 35,778,837 Accraed payroll..
Accrued compensated absences..
63,956,759 55,665,044 Deferred revenue and student deposits.
14,206,034 13,610,337 l
Accrval self insurence.
40,652,836 24,704,347 g
Fund coficits.
(20,375,881)
(19,664,282) j Total unrestricted.
163,738,608 138,180.164 Restricted -
Accounts payable.
5,497,730 5,378,153 Accrued payroll....
4,446,157 4,623,440 Accrued compensated absences.
3,252,880 2,718,882 Fund balances, 72,890,635 68,328,161 Total restricted.
88,087,402 81.048,636
$ 249,828,010
$ 219.228,800 Total current funds Loan funds:
Accounts payable.
48,367 198,236 Fund balances -
Refundable Federal loan funds - restricted 23,665,610 22,459,061 Private gifts and other - restricted 7,720,893 7,145,303 State matching funda 2,647,574 2,488,936 Total fund balances 34,034,077 32,093,300 i
Total loan funds.
6 34,082.444 8
32.2s',536 Endowment and similar funds:
Fund balances -
Endowments restrict ed.
18,093,415 8
16,669,247 Quasi-endowments - restricted.
22,156,332 19,143,251 Living trusts - restricted.
136,067 136,008 United States land grant - unrestricted.
649,013 649,013 Total endowment and similar funds..
8 41,034,827 36,597,519 Plant funds:
Accounts payable 8,986,625 7,226,793 Accrued interest.
733,821 792,767 Bonds payable.
138,608,082 133,276,357 Leaseholds payable,
60,772.687 60,932,768 Fund balances -
Unexpended - restricted.
12,918,128 38,995,550 Renewals and replacements - restricted 10,862,872 11,974,894 Retirement of indebtedness - restricted.
21.359,316 20,242,066 Net investment in plant.
1,553,315,040 1,417,968,347 Total plant funds
$1,807.556,571 61,691,409,542 Agency funds:
Assets held in custody for others, 1,955,486 8
3,854,989 5
O UNIVERSITY OF ILLINOIS STATEMENT OF CHANGES IN FUND BALANCES (DEFICIT)
YEAR ENDED JUNE 30, 1988 WITH COMPARATIVE TOTALS FOR 1F87 CUREENT FUNDS LOAN UNRESTRICTED RESTRICTED FUNDS Revenues and other additions:
Unrestricted current funds revenues.
$921,759,846 8
Federal appropriations.
15,481,884 Medical service plan 33,419,598 Restricted gifts, grants and contracts -
77,853,225 596,633 Private.
Federal.
180,211,354 603,215 State of Illinois.
27,657,107 Investment income - restricted 5,777,242 695,171 Net realized gains on investments - restricted State appropriations, restricted.
Interest and service charges on student loans.
680,743 Decrease in allowance for uncollectable notes.
307,796 Additions to plant facilities -
From current funds expenditures.
From plant funds expenditures.
From other State of Illinois aseteles, j
principally Capital Development Board j
Acquired through capital leases.
Retirement of indebtedness -
I Bonds defensed..
]
Bond principal payments.
Bond proceeds net of underwriters
- fees
($0 in 1988 and $1,072,619 in 1987)
Increase of equity in capitalized leased assets -
Adjustment in equity in capitalized leased assets.
Lease principal payments 1,457,066 476 Other.
Total revenues and other additionu.
921,759,846 341.857,476 2.884,034 Expenditures and other deductions:
Educational and general expenditures 668,676,821 278,610,128 Auxiliary enterprises orpenditures.
99,307,669 2,208 Hospital expenditures.
120,357,231 57,384 4,580,976 22,950 Independent operations expenditures.
Indirect costs recovered 48,4/2,078 Educational and aaninistrative allowances recovered.
5W0,201 Refunds to grantors.
518,415 230,478 Student notes receivable assigned to U. S. Government.
107,413 Cancellation of loans under terms of gifts and grants.
81,752 Increase in leaseholds payable.
Expended for plant facilities -
Capitalized expenditures -
Land.
Buildings.
Improvements other than buildings.
Equipment.
Noncapitalized expenditures.
Deposit to advance refunding escrow.
Retirement of indebtedness Interest on indebtedness Bonds issued Capital appreciation on bonds payable.
Trade-ins, disposals and property adjustments.
Payments to beneficiaries of life income trusts.
Amortization of prepaid expense.
Other deductions.
Total expenditures and other deductions.
892,922,697 328,273,364 419,643 Continued on following page.
6
- 7. -
I
'-)
1
.C-PLANT FUNDS ENDOHMENT RENEWALS RETIRFMENT INVESTMENT COMBINED COMBINED AND SIMILAR AND OF IN TOTALS TOTALS 1987
- FUNDf' UNEXPENDED REPLACEMENTS INDEBTEDNESS PLANT 1988 (MEMD ONLY)
S'
$ 921,759,846
$ 905,311,786 15,481,884-14,136,400 33,419,598 31,826,822 182,060 3,283,009 65,000 9,508,170 91,488,097 118,112,618 3,466,636 2,113,379 186,394,584 168,859,740 32,380 27,689,487 26,399,714 3,161,874
~657,988 814,103 11,106,378 11,4'12,261 2,768,044 2,768,044 1,667,449 1,043,526 1,043,526 8,747,178 680,743 900,546 307,796 1,050,789 64,397,527 64,397,527 77,655,032 56,864,534 56,864,534 41,706,639 16,547,528 15,442,255 31,989,783 11,346,796 13,424,176 13,424,176 53,265,487 28,576,662 10,335,000 10,335,000 10,014,000 6,907,500 793,528 7,701,028 45,562,979 56,500 56,500 6,742,764 13,527,757 13,527,757 14,384,400 705 291,567 1,749,814 1,067,547 2,950,809 17,894,925 17.270,516 1,899,198 185,669,298 1,492,186,102 1,579,147,609 947,286,949 920,585,948 99,309,877 92,308,172 120,414,615 118,669,329 4,603,926 4,336,139 48,472,078 43,935,946 l
500,201 277,299 l
12,071 760,964 646,664 107,413 1,403,600 81,752 44,201 13,424,176 13,424,176 57,465,487 1,621.240 1,621,249 3,824,403 50,512,284 1,444,742 51,957,026 35,069,437 2,160,303 (3,366) 2,156,937 1,333,097 724,977 404,345 1,129,322 1,479,702 1,564.174 20,489,621 22,053,795 7.158,518 293,175 293,175 39,913,064 23,862,757 23,862,757 24,398,400 8,158,266 8,158,266 5,619,625 6,907,500 767,500 7,675,000 46,635,598 7,991,725 7,991,725 7,310,468 9,232,434 9,232,434 46,462,061 18,710 18,719 20,191 1,480,000 1,480,000
(
287 287 703 10,006 63,502,558 22,335,342 32,314,198 32,895,835 1,372,682,643 1,458,898,052 l
7
UETVERSITY OF ILLINOIS O
-STATEMENT OF CRANGES IN FUND BALANCES (DEFICIT) (Cv'tinu2d)
YEAR ENDED JUNE 3D,1988 WITH CCPIPARATIVE TOTALS TM; *.987 CURRENT FUNDS LOAN UNRESTRICTED RESTRICTED FUNDS
~ Transfers additions (deductions):
Mandatory -
Renewals and replacements.
8 (3,589,170)
Retirement of indebtedness.
(24,299,338)
(5,760,517)
Student loan matching.
(50,000) 50,000 Investment income utilired for bond and interest sinking fund Bond principal ut111:ed for bond and interest sinking fund.
Non-mandatory -
Bond principal utilized for capitalized and noncepitalised expenditures.
Renewals and replacements.
(367,367)
Other, net..
(1,242,873)
(3,261,121)
(573,614)
Total transfers (29,548,748)
(9,021,638)
(523,614)
Increase (decrease) in fund balances.
(711,S99) 4,562.474 1,940,777 Fund balances (deficit) at beginning of year...
(19,664.282) 68,328,161 32,093,300 Fund balances (deficit) 't end of year. -
$(20,375.881)
$ 72,890,635
$34,034,077 f
See accompanying notes to financial statements.
l l
1
!l l
}
8
y 5
PLANT FUNDS ENDOHMENT REFEWALS RETIREMENT INVESTMENT COMBINED COMBINED AND SIMILAR AND-OF IN TOTALS TOTALS 1987 FUNDS' UNEXPENDED REPLACEMENTS INDEBTEDNESS PLANT 1988 (MEMO ONLY) i
$ ~
$ 3,589,170 (527,762) 30,587,617
- (943,013) 941,013 (3,620) 3,620 17,426,770 (17,426,770) 367,367 1,505,505 3,575,836 (3,733) 1,505,505 19,530,211 3,952,804 31.532,250 (17,426,770) 4,437,308 (26,077,422)
(1,112,022) 1,117,250 135,346,693 119,503,459 120,249,557 36,597,519 38,995,550 11,974,894 20,242,036-1,417,968,347 1,606,535,555 1,486.285,998
$41,034,827 8 12,918,128
$10,862,872
$21,359,316
$1,553,315,040 61,726,039,014
$1,606,535,555 9
' UNIVERSITY OF ILLIFOIS O
SIATEMENT OF CURRENT FUNDS REVENUES, EXPENDITURES AND OTHER CHANGES YEAR ENDED JUNE 30, 1988 WITH COMPARATIVE TOTALS FOR 1987 UNRESTRICTED COMBINED STATE TOTAL
' TOTAL 1987 APPROPRIATIONS OTHER RESTRICTED 1988 (MDO ONLY)
.Ravsnues:
Educational and general -
tudent tuition and fees,
. $128,689,005 $
$ 128,689,005 8 112,596,902 tate appropriations.
464,953,333 464,953,333 486,042,142 ederal appropriations 15,099,236 15,099,236 15,801,149 goderal grants and contracts 42,609,879 137,515,249 180,125,128 168,449,087
' State of Illinois grants and contracts.
1,379,710 26,010,485 27,390,195 26,387,863-Private gifts, grants and contracts.
5,503,345 65,765,911 71,269,256 66,563,690 Endowment income 32,451 2.984,518 3,016,969 3,212,886 Other sourcesi 4,047,867 45,491,760 37,077,788 86,617.415 70,0t0,243 Total educational and general revenue, 597,722,656 94,984,694 284,453,187 977,160,537 949,133,962
' Sales and services of auxiliary enterprises.
118,904,356 118,904,356 113,790,654 Sales and services of hospital,,.
105,465,415 105,465,415 105,266,978 Independent operations 4,682,725 4,682,725 4,148,169 Total revenues, 597,722,656 324,037,1PO 284,453,187 1,206,213.033 1,172,339,763 Expenditures and mandatory transfers:
Educational and general -
Instruction, 249,807,327 7,971,168 44,752,246 302,530,741 298,506,264 Research 32,472,012 21,793,566 157,045,692 211,311,270 199,647,690 Public service.
33,851,695 20,525,063 47,686,007 102,062,765 93,851,174 Academic support 87,529,179 11,536,636 2,341,246 101,407,061 105,844,996 Student services 15.059,011 477,620 735,524 16,272,155 15,743,193 j
Institutional support.
54,071,078 10,715,790 2,094,845 66,881,713 67,867,281 Operation and maintenance of plant 72,439,959 13,792,922 307,532 86,540,413 85,009,218 Scholarships and fellowships.
34,682,699 1,951,096 23,647.036 60,280,831 54,116,132 Total educational and general expenditures 579,912,960 88,763,861 278,610,128 947,286,949 920,585,948 Mandatory transfers for -
Retirement of indebtedness 3,213,462 7,762,754 5,760,517 16,736,733 14,921,489 Student loan mateting grant.
50,000 50,000 15,158 Total educational and general.
583,176,422 96,526.615 284,370,645 964,073,682 935,522,595 Auxiliary enterprises -
Expenditures 99,307,669 2,208 99,309,877 92,308,172 Mandatory transfers for -
Renewals and replacements.
3,589,170 3,589,170 3,429,450 Retirement of indebtedness 12,040,692 12,040,692 9,001,634 Total auxiliary enterprises 114,937,531 2,208 114,939,739 104,739,256 Hospital -
Expenditures.
15,509,933 104,847,298 57,384 120,414,615 118,669,329 Mandatory transfers for retirement of indebtedness, 1,192,244 1,292,244 1,531,934 Total hospital.
15,509,933 106,039,542 57,384 121,606,859 120,201,263 Independent operations -
l Expenditures 402,822 4,178,154 22,950 4,603,926 4,336,139 Mandatory transfers for retirement of indebtedness, 90,186 90,186 62,360 Total independent operations.
402,822 4,268,340 22,950 4,694,112 4,398,499 Total expenditures and mandatory transfers.
599,089,177 321,772,028 284,453,187 1,205,314,392 1,164,861,613 I
10
- e-(
F e _;
UNIVERSITY OF ILLINOIS E',. STATEMENT OF CURRENT FUNDS REVENUES, EXPENDITURES AND OTHER CHANGES (Continasd)
YEAR ENDED JUNE 30, 1988 WITH COMPARATIVE TOTALS FOR 1987 UNRESTRICTED COMBINED STATE TOTAL TOTAL 1987 APPROPRIATIONS OTHER RESTRICTED 1988 (MEMO ONLY) l Othsr transfers and additions (deductions):
Excssa of restricted receipts over transfers to revenues,
.8 8
8 8,342,010 8 8,342,010 8 7,723,690 Refunds to grantors, (518,415)
(518,415)
(196,029)
Inter-fund transfers -
Current funds, (1,370,699).
2,542,877 (1,172,178)
J Loan funds.
653,975 (80,658) 573,317 280,356 Endowment and similar funds.
(1,505,207)
(1,505,207}
'(105,011)
Plant funds -
Unexpended,
(3,072,759)
(503,078)
(3,575,837)
(2,425,002)
Renewals and replacements..
(383,634)
(363,634)
(2,283,106),
Total other transfeza and additions (deductions).
(1,370,699)
(239,$41) 4,562,474 2,952,234 2,994.808 Total increase (decrease) in fund balances.
8 (2,737,220) $ 2,025,621 8 4,562,474 8 3,850,875 8 10,472,958 See accompanying notes to financial statements.
l l:
l l
11
e O
UNIVERSITY OF ILLINOIS NOTES TO FINANCIAL STATEMENTS 1 - Summerv of Ef tnific ant Accountina Policies The University of Illinois (University), a federal land grant institution and an agency of the State of Illinois, conducts education, research and public service and related activities principally at its two campuses in Urbana-Champaign and Chicago which includes the University of Illinois Hospital (Hospital) and other health care facilities.
The governing body of the University is The Board of Trustees of the University of Illinois (Board).
The accompanyir.g financial statements present the combined financial position and financial activittee of the University's various operations, including certain activities and expenditures funded by other State agencies on behalf of the University or its employees.
The accounts of the University of Illinois Foundation, The Athletic Association of the University of Illinois at Urbano-Champaign and The University of Illinois Alumni Association, related organizations which conduct principally fund raising activities and collegiate athletics on behalf of the University, are not included in the accompanying financial statements (Note 7),
Pasis of presentation The financial statements of the University are prepared on the accrual basis of accounting, except for depreciation accounting as explained below.
The accounts of the University are maintained in accordance with the principles of fund account-ing.
Under fund accounting, resources are classified for accounting and reporting purposes into funds according to specified activities or objectives.
Separate accounts are maintained for each fund; how-ever, funds with similar characteristics are combined into fund groups in the accompanying financial statements, Within each fund group, fund balances restricted by outside sources are so indicated and are dis-tinguished from unrestricted funds. Restricted resources may only be used for the purposes established by the source of such funds.
Included in Current Unrestricted Funds is the University of Illinois Income Fund (University Income Fund) which consists of student tuition and fees that, by law, are depoalted with the State Treasurer. These funds must be appropriated by the State Legislature before they can be expended.
The Statement of Current Funds Revennes, Expenditures and Other Changes is a statement of finen-ciel activities of the Current Funds.
It does not purport to present the overall results of operations of the University as would a statement of revenues and expenses. In the accompanying financial state-ments, the use of Current Funds to acquire or finance assets of the Plant Funds is accounted for as (a) expenditures in the case of the normal replacement of equipment and ordinary repairs and maintenance and (b) mandatory and other transfers when providing for debt service, repair and replacement reserves and all other cases.
Claim on cash and cooled investments Various University funds have cash and certain investments which are pooled for the purpose of securing a greater return on investment and providing an equitable distribution of investment return.
Fooled investments, which consist principally of U.
S.
Government and government agency securities, time deposits, corporate commercial paper, and short to intermediate term mutual fund investments, are stated at cost which approximates market, Income is distributed based upon average quarterly belances invested in the pool.
Total claim on cash and pocled investments included net cash overdraft book balances of
$8,479,115 and net cash balances of $3.158,340 at June 30, 1988 and 1987, respectively.
Total bank balance at June 30, 1988 was $2,858,754 of which $1,166,755 was covered by federal deposi-tory insurance or collateral held by a third party, $187,779 was covered by collateral held in the pledging bank's trust department in the University's name, and $1,504,220 was uninsured and uncollater-alized.
Investments Investments, including real estate and farm properties, are stated at cost or, when donated, at the fair market value at the date of donation.
Investment income, including rains and losses resulting from the sale or other disposition of investments, is recognited in the fund which owned such invest-ments, except for income derived from investments of the Endowment and Similar funds which is recos-nized in the funds to which the income is restricted.
Illinois Statutes and Board of Trustee's policy authorise the University to invest in obligations of the U.
S.
Treasury, agencies, and instrumentalities, bank and savings and loan time deposits, cor-g porate bonds, stock and commercial paper, repurchase agreements, and mutual funds.
The University did l
not enter into any repurchase agreements for the year ended June 30, 1988, 12
7 i
l e
l 4
j The University's investments, including pooled investments but excluding real estate and farm pro-porties, are categorized below to give an indication of the level of risk assumed by the University at June 30, 1988.
Category 1 includes investments that are insured or registered or for which the securi-ties are held by the University or its egent in the University's name.
Category 2 includes uninsured j
and unregistered investments for which the securities (or collateral) are held by the broker's or l
dealer's trust department or agent in the University's name.
Category 3 includes uninsured and un-l registered investments f or which the securities are held by the broker or dealer, or by its trust l
department or agent but not in the University's name.
Cetemory Carrying Market 1
2 3
Amount Value Certificate of Deposits
$400,000 $ 3,000,000 3,400,000
$ 3,400,000 U. S. Government Securities 69,139,304
$ 1,063,767 70,203,071 70,098,909 Commercial Paper 33,438,631 33,438,631 33,476,250 Corporate Bonds 1,700 1,700 85 Corporate Stock 179.250 9.135 188.38},
279.343
$400,000 $72,318,554
$34,513,233 107,131,787 107,254,587 Mutual Funds - Bonds 21,461,410 21,943,625 Mutual Funds - Stocks 20,588,958 17,943,833 Mutuni Funds - Money Market 60,127,314 60,127,314 Equity in UI HMO 390,770 390,770 Equity in MedCaro HMO 300.000 300.000 Total Investments
$210,100,239
$207,960,129 Inventories Invento;1 s are stated at the lowar of cost or market.
Investment in vient Investment in plant is carried at cost or, when donated, at the fair market vslue at the date of donation.
In accordance with generally accepted accounting principles for colleges and universities, the University does not record depreciation on these assets.
Additions to the University's investment in plant financed by the State of Illinois Capital Devel-opment Bosed (CDB) are recorded by the University as the funds are expanded by the CDB.
Expenditures of the CDB for University-related repair and maintenance projects are recorded as expenditures from and additions to the University's Plant Funds.
Accrued esif insurance Accrued self insurance of $40,652,836 and $24,704,347 for the years ended June 30, 1988 and 1987, respectively, covers hospital patient liability; hospital and medical professional liability; estimated general and contract liability; and workers' compensation liability relative to employees paid from local funds. Amounts increasing the self-insurance liability are charged to Current Funds expenditures based upon estimates made by actuaries.
Workers' compensation self insurance of $3,900,000 and
$4,800,000 at June 30, 1988 and 1987, respectively, for the estimated liability related to employees who are paid from State appropriations are included in Accounts Payable.
These claims will be paid from State appropriations in the year in which the claims are finalized, rather than from the current unrestricted funds at June 30, 1988 and 1987 Accrued self insurance includes $30,091,899 and $16,868,754 at June 30, 1988 and 1987, respect-ively, for the most probable and reasonably estimable ultimate cost of uninsured medical malpractice liabilities recorded in accordance with the Amatican Institute of Certified Public Accountants State-ment of Position 87-1,
" Accounting for Asserted and Unasserted Meterial Malpractice Claims of Health Care Providers and Related Issues".
Ultimate cost consists of amounts determined by actuaries, using relevant industry data and hospital specific data to cover asserted claims, reported unasserted claims, projected losses for claims incurred but not reported, and estimated litigation expenses, The Univer-sity has contr ac ted with several commercial carriers to provide varying levels and upper limits of excess indemnity coverage.
These coverages have been considered by the actuaries in determining the required self-insurance liability balances.
As of June 30, 1988, the self-insurance liability of $40,652,836 has been fully funded.
This amount has been discounted to account for future expected earnings on invested assets.
The undis-counted carrying amount of the self-insurance liability is $51.588,717 and $33,041,711 at June 30, 1988 and 1987, respectively.
13
e 9
LRevenue reeoanition-Appropriations made from the State of Illinois General Revenue Fund for the benefit of the Univer-U
. sity are recognized as revenues to the extent expended, limited to available appropriations,
, Tuition and fees,' except for the Summer Session, are recognized as revenues as they are assessed.
The portion of Summer Session tuition and fees applicable to the following fiscal year is deferred.
- The - value. of tuition and fee exemptions awarded to graduate assistants, staff members and others is included in both revenues from student tuition and fees and in expenditures for scholarships and fel-lowships. These exemptions amounted to $32,868,680 and $27,741.101 in 1988 and 1987, respectively.
Current Restricted Funds which are received or receivable from external sources are recognized as revenues to the extent of related expenditures on the accruel basis and as additions to fund balance (excess of restricted' receipts over transfers to revenues) to the extent funds are received in excess of expenditures.
Ernenditure recognition Employment contracts for certain academic personnel provide for twelve monthly salary payments, although the contracted services are rendered during a nine month period. The liability for those em-playees who have completed their contracted services, but have net yet received final payment, was ep-proximately $18,000,000 and $18,600,000 at June 30, 1988 and 1987, respectively, and is recorded in the accompanying financial statements, These amounts were subsequently paid from amounts specifically in-cluded in State of Illinois General Revenue Fund appropriations to the University for fiscal years 1989 and.1988, respectively, rather than from the Current Unrestricted Funds at June 30, 1988 and 1987.
Substantially all employees participate in group health insurance plans administered by the State of Illinois. The employer contributions to these plans on behalf of University employeen paid by State appropriations and auxiliary enterprises are funded from separate State appropriations to another State agency - and are not reflected in the mucompanying financial statements.
The amount of such contribu-tions cannot be determined. The employer contributions to these plans on behalf of employees paid from other University-held funds are paid by the University.
Accrued compensated absenc9s for University personnel are charged to Current Funds based on earned but unused vacation and sick leave days, At June 30, 1988 and 1987, the University estimates that
$34,000,000 and $39,000,000, respectively, of the accrued compensated absences liability will be paid out of State of Illinois General Revenue Fund appropriations to the University in years subsequent to June 30, 1988 and 1987, respectively, rather than from Current Unzwstricted Funds available at June 30, 1988 and 1987.
2 - Investments Investments of the Current, Loan and Plant Funds consist principally of United States Government and government agency securities, certificates of deposit and similar short-term investments. The car-rying value of these investments approximates market value.
The carrying value and approximate market value of investments of Endowment and Similar Funds at
-June 30, 1988 and 1987 were as follows:
1988 1987 Carrying Carrying value._,
Market Value Ma rk et d
Certificates of Deposit and q
Honey Market funds S 3,501,013
$ 3,501,013 United States Government and government agency securities
$14,289,339 S14,794,933 I
Corporate bonds and commercial paper 10,340,671 11,038,904 7,657,836 7,550,756 Common and preferred stocks 20.767.458 18.219.873 8.032.538 10.892.115 Total
$34,609,142 832,759,790
$29,979,713 S33,237,804 Endowment and Similar Funds also include real estate and farm properties, the income from which is in-cluded in endowment income.
3 - Funds Neld in Trust by others The University is an income beneficiary of several irrevocable trusts which are held and admin-intered by outside fiscal agents.
The University has no control over these funds as to either invest-ment decisions or. income distributions, thus the principal is not recorded in the accompanying 14 i
e 0
e financial statements, The market value of these funds at June 30, 1988 and 1987 and the amoisnt of income received from their trustees during the years then ended were am follows:
1988 1911 Market value of funds held in trust by others
$11.107.128
$10,753,352 Income received from funds held in trust by others 460,216 514,839 j
4 - Bonds Pevable At June 30, 1988, bonds payable consist of University of Illinois Auxiliary Facilities System (System) Revenue Bonds, Series 1984, Series 1985, and Series 1986 (Series 1984, 1985, and 1986 Bonds) 2 University of Illinois Revenue Bonds, Series 1985A and Series 1985B (Series 1985A and 1985B Bonds) and University of Illinois Revenue Bonds, Series 1987 (Series 1987 Bonds).
Series 1984 Bonds -
Ca September 27, 1984, the Series 1984 Bonds were issued in the principal amount of $55,267,602.
The beries 1984 Bonds are capital appreciation bonds which do not require current interest payments.
They mature semi-annually, commencing October 1, 1990, at amounts sufficient to produce yields ranging from 8.75% to 11.40%.
The University records the annual increese in the principal amount of the honds as capital appreciation on bonds payable.
Froceeds from the sale of the Series 1984 Bonds, together with other available funds from the Sys-tem, were used to advance refund the University of Illinois Auxiliary Facilities System Revenus Bonds, Series H and N (Series H and N Bonds), to fund a debt service reserve, to pay all costs incidental to the issuance of the Series 1984 Bonds and advance refunding, and to finance certain expenditures relat-ed to the planning and development of various proposed additions to the System.
Series 1985 Bonds -
On July 25, 1985 the Series 1985 Bonds were issued in the principal amount of $56,750,000.
The Series 1985 Bonds were issued as parity bonds pursuant to the Bond Resolution authorizing the issuance of the Series 1984 Bonds.
They bear interest at rates ranging from 5.01 to 8.0% per annum, payable semi-annually, commencing October 1, 1985.
The Series 1985 Bonds mature semi-annually, beginning Octo-ber 1, 1985 through April 1, 2009.
Proceeds from the sale of the Series 1985 Bonds are being used (a) for remodeling, repair, equip-ment replacement and improvement of certain existing facilities of the System; (b) for construction of facilities which will become part of the System including construction of a residence hall and new parking facilities on the Chicago campus, renovation of an ice arena, construction of a recreation otructure and improvements and additions to athletic facilities at the Urbana-Champaign campus; (c) to fund the Debt Service Reserve in an amount equal to the difference between the Maximum Annual Het Debt Service and the balance in such account at the time of delivery of the Series 1985 Bonds; and (d) to pay certain orpenses relating to the issuance of the Series 1985 Bonds.
Series 1985A and 1985B Bonds -
On June 12, 1965, the Series 1985A Bonds were issued in the principal amount of $2,700,000.
On July 25.,
1985, the Board issued the Series 1985B Bonds in the principal amount of $2,025,000.
The Series 1985A Bonds bear intercat et 9.70%, per annum, and the Series 1985B Bonds bear interest at rates ranging from 6.25% to 8.90%, per annuth both payable semi-annually, commencing October 1, 1985.
The 1985A Bonds mature semi-anr.ually, beginning October 1, 1996 through April 1, 2003 and the Series 1985B Bonds mature semi-annually, beginning October 1, 1986 through April 1, 1996.
The Series 1985A and 1985B Bonds were issued in connection with the advance refunding of debt relating to the Construction Engineering Research Laboratory (CERL) and to fund future additions to CERL.
Series 1986 Bonds -
On August 14, 1986, the Series 1986 Sonds were issued to the principal amount of $46,635,598.
The Series 1986 Bands are capital appreciation bonds which do not require current interest payments. They mature semiannually, commencing 0:tober 1, 1996 through April 1, 2009, et amounts suf ficiant to pro-duce yields ranging from 7.2% to 8.125%.
Proceeds from the sale of the Series 1986 Bonds were usad (a) in advance refund tha Seriez 1984 Bonde due October 1, 1996 through April 1, 2009; (b) to finance various additione and enhancements to the Sy st en,; and (c) to pay all costs incidental to the issuance of the Enries 1985 Londs and the ad-vence refunding. The annual. not Debt Seavice pas not charged by the refunding.
15 l
I
e 9
Series 1987 Bonds -
On September 17, 1987, the Series 1987 Bonds were issued in the principal amount of $7,675,000.
The Series 1987 Bonds bear interest at rates ranging from 7.30I to 8.40% per annum, payable semi-annually, commencing April 1, 1988.
They mature annually, beginning April 1,
1990 through April 1,
2009.
Proceeds from the sale of the Series 1987 Bonds are being used (a) for Willard Airport expansion project coste: (b) to fund a Debt Service Reserves (c) to purchase bond insurance; and (d) to pay tortain expenses relating to the issuance of the Series 1987 Bonds.
Advance refunded bonds -
Certain revenue bonds of the Board have been defensed through advance refundings and, accordits)y, have been accounted for as if they were retired, The principal amount of advance refunded bonds out-standing at June 30, 1988 is $143,741,484 Debt service requirements and security -
Future debt service requirements for all bonds outstanding are as follow:
Interest and Capital Prinelval Arrreciation 1989
$ 11,000,000
$ 2,655,723 1990 12.115,000 1,846,573 1991 10,410,859 3,548,561 1992 0,545,674 4,416,277 1993 8,703,171 5,247,062 1994-2009 86.833.378 127 566.684 Total
$138,608,082 8145,280,880 The Maximum Annual Net Debt Service, as defined, for all outstanding debt is $12,939,-215.
None of the bonds described above constitute obligations of the State of Illinois or of the Board.
Series 1984, 1985 and 1986 Bonds are payable solely by the Board from net revenues of the System, stu-dont tuition and fees and certain restricted plant funds. -Series 1985A and Series 1985B Bonds are payable solely from the not revenues of CERL and, under certain circumstances, the not revenues of the System, student tuition and fees and certain restricted plant funds.
Series 1987 Bonds are payable solely from the not revenues of the airport facilities and related restricted plant funds, 5 - Leeses The University leases various plant facilities and equipment under impital leases.
Assetc held under capital leases are included in investment in plant as follows:
1988 1987 1.and S
744,716 8
703,642 Equipment
$3,985,876 51,830,526 Telecommunications System 34.870.000 34.670.000 Total 889,600,592
$87,404,168 As of June 30, 1988, future minimum lease payments under capital leases are as follows:
1989
$16,664,722 1990 13,822,236 1991 11,760,087 1992 9,730,820 1993 6,843,235 Later years 19.538.266 Total minimum lease payments 78,359,366 Amount representing intorest 17.586.679 Not present value S60,772,687 16
e 4
e 6 - State Universities Retirement System The University participates in the State Universities Retirement System of Illinois (SURS), a cost-sharing maltiple employer public employee retirement system.
Cligible employees must participate upon initial employment. Employees are ineligible to partici-pate if a) employed after having attained age 68; b) employed less than 50 percent of full-time; or c) l employed less than full-time and attending classes with an employer.
Of those University employees ineligible to participate, the majority are students at the University.
For the year ended June 30, 1988, total University payroll was $701,516,000; of this amount, $568,338,000 represented earnings for covered employees and was reported to SURS.
Participants are required by statute to contribute 8% of their gross earnings to SURS.
For the year ended June 30, 1988, this amounted to $45,451,000.
The University contributes annually an amount determined by the State Legislature from State appropriations and amounts from other current funds based on actuarially determined rates.
Contributions by the University to SURS for the year ended June 30, 1988 were $38,784,000 which consisted of $32,237,000 from State appropriations and $6,547,000 from other current funds; these contributions represented 6.8% of covered payroll.
The University contributes 14.5% of the actuarially determined contributions required from all participating employ-era.
Contributions by the University to SURS for the year ended June 30, 1987 were $45,876,000 which consisted of $37,276,000 from State appropriations and $8,600,000 from other current funds.
SURS provides retirement, disability and death benefits.
Members are eligible for normal retire-ment at any ese after 35 years of service, at age 60 after 8 years of service or at age 62 after 5 years of service.
There are also provisions for early retirement.
Retirement benefits are based on certain formulas that generally are a function of years of service and the average salary based on the highest earnings of any four consecutive years.
Disability benefits are paid to disabled members with two years of covered service, generally at 50 percent of basic compensation until the total benefits paid equal 50 percent of the total earnings in covered service.
Death benefits are payable to sur-vivors of an active member with cae and one half years of covered service or of a former member with ten years of covered service.
These benefits are payable until children attain the age of 18, to a spouse after aan $0 and to a dependent parent after age 55.
Benefits are equal to the retirement contributions and interest, a lump sum payment of $1,000, and a monthly annuity equal to a portion of the accrued normal retirement benefit based on specified formulas.
The pension benefit obligation shown below for GURS as a whole is a standardized disclosure men-sure of the present value of pension benefits, adjusted for the effects of projected salary increases, estimated to be payable in the future as a result of employee service to date.
The measure is the actuarial presenu value of credAted projected benefits and is intended to help users assess SURS' funding status on a going concern basis, assess progress made in accumulating sufficient assets to pay benefits when due, and make comparisons among public employee retirement systems.
The SURS does not maks separate measurements of assets and pension benefits obligations for individual employees.
This information is based on the most recent information available from the SURS Component Unit Financial Report for the year ended June 30, 1987.
Total pension benefit obligation
$4,234,900,000 Not assets available for benefits 2.470.500.000 Unfunded pension obligation
$1,764.400,000 Ten year historical trend information is available in the above-mentioned SURS report.
University er.ployees are exempt from contributing to Social Security.
Employees of the University may also elect to participate in certain tax-sheltered retirement plans under Section 403(b) of the Internal Revenue Code.
These voluntary plans permit employees to designate a part of their earnings into tax-sheltered investments and thus defer federal and state incope taxes on their contributions and the accumulated earnings under the plans.
Participation and the level of employee contributions are voluntary.
The University is not required to make contribu-tions to these plans.
7 - IIfnsections with Rel at ed Orteniz ations The University of Illinois Alumni Association (Alumni Association). The Athletic Association of the University of Illinois at Urbana-Champaign (Athletic Association), and the University of Illinois Foundation (Foundation) are related organizations formed to support in various ways the University's j
instructional, research and public service missions.
The University provides these organizations with office space, facilities use, and various goods and services at charges approximating the University's cost and has also provided other items at no charge. These transactions are not material to the University's financial statements.
17
e I
e The University leases various properties from the Foundation under capital lease obligations amounting to $745,000 and $704,000 at June 30, 1988 and 1987, respectively.
There were no principal payments made under these leases in 1988 and in 1987.
The following financial information is summarized from the audited financial statements of the Foundation, Athletic Association and Alumni Association:
Athletic Alumni Foundetion Association disocirtion At June 30, 1988 -
Total Assets (primarily cash and investments)
$136,313,000
$ 5,799,000
$ 6,937,000 Liabilities S
5,0C0,000
$ 6,000,000 8 179,000 Fund balances:
Current -
Unrestricted 144,000 (2,833,000) 46,000 Restricted 11,670,000 6,494,000 Endowment and similar funds 106,211,000 Annuity and life income funds 9.128,000 Plant funde 4.100.000 2.632.000 218.000 Total fund balances 131.253.000 (201.060) 6.758.000 e
Total liabilities and fund balances
$136,313,000
$5,799,000
$6,937,000 At June 30, 1987 -
Total Assets (primarily cash and investments) 8128,916,000
$6,954,000
$6,387,000 Liabilities 8
4,720,000
$5.159,10D
$ 161,000 Fund balances:
Current -
Unrestricted 178,000 (683,000) 13,000 Restricted 9,979,000 6,027,000 Endowment and similar funds 94,341,000 Annuity and life income funds B,153,000 Plant funds 11.545.000 2.478.000 186.000 Total fund balances 124.196.000 1.795.000 6.226.000 Total liabilities and fund balances
$128,916,000
$6,954,000
$6,387,000 For the year ended June 30, 1988 -
Revenues and other additions -
From the University 8 1,516,000
$ 1,636,000 60,000 Others 37.669.000 11.764.000 2.196.000 Total revenues and other additions 39,185,000 13,400,000 2,256,000 Expenditures and other deductions -
Gifts to the University -
Restricted 28,916,000 Unrestricted 486,000 Rental and other payments to the University 117,000 1,839,000 63,000 Others 2.609.000 13.557.000 1.661.000 Total expenditures and other deductions 32.*28.000 15.396.000 1.724.000 increase (decrease) in fund balances 8 7,057,000
$(1,996,000)
$ 532,000 18
1
-4
- - 4" 4'
Athletic Alumni Foundation Association Association eFor the year ended June 30, 1987 -
Revenues and other additions.
i I
From the University ~
.8 1,435,000~
$ 1,806,000 8 7 83,000 Others'..
68.492.000 13.331.000 2.317.000 l
l Total revenues and other additions 69,927.,000 15,137,000 2.,400,000 Expenditures'and other deductions Gifts to the University -
' Restricted 61,940,000 Unrestricted 769,000 i
Rental and other payments i
to the University 65,000-1,826,000 62,000 Others 2.e40.000 13.700.D00 1.646.000 Total expenditures and other deductions 65.614.000 15.526.000-
'1.708.000
. Increase (decrease) in fund balances 8 4,313,000
$ (389,000) 8 692.000 Revenues of the Foundation consist primarily of restricted and unrestricted gifts for the benefit of the University. Revenues of the Athletic Association are related to athletic activities, principal-ly intercollegiate. Revenues of the Alumni Association relate principally to alumni memberships.
.For the Athletic Association certain account classifications were changed in 1987 to agree with 1988 classification.
Subscauent event The University formed a. task force in July 1968 for the intercollegiate athletic programs of the -
Urbana-Champaign campus. The objective of the task force is to bring the governance of intercollegiate -
-athletics from its current stand-alone structure to a position within the structure of the University.
8 - Commitments and Contingencies Encumbrances Encumbrances which represent goods or services that have been ordered for which delivery has not been made or the services have not been rendered at June 30, 1988 are not recorded in the accompanying financial statements.. Encumbrances of the Current Funds were approximately $17,910,000 at June 30, 1988.
Contreets and arents The University. receives monies from Federal and State government agencies under grants and con-tracts for research and other activities, including medical service reimbursements.
The costs, both
-direct and indirect, charged to these grants and contracts are subject to audit and di> allowance by the granting agency.
The University administration believes that any disallowances or a djustments would not have a material effect on the University's financial position.
leaal actions The University is a defendant in a number of legal actions primarily related to medical malprac-tice.
These legal actions have been considered in estimating and funding the University's self-insur-ance liability program. The total of amounts claimed under these legal actions, plus gptential settle-j, ments and amounts relating to losses incurred but not reported; could materially excbed the amount of the self-insurance liability accrual. In the opinion of the University's legal counsel and its admin-1strative officers, the University'r self-insurance liability fund and 21mited excess indemnity insur-ance coverage from commercial carriers are adequate to cover the. ultimate liability of these legal actions, in all material respects.
Currently, the financial stability is uncertain for one of the commercial carriers providing excess indemnity coverage to the University.
Also, a second carrier is in liquidation and a third is
. experiencing financial difficulty and is currently being supported by the Irish government.
The University's s elf-insuranc e ' liability accrual has been reduced by $12.7 million and 27.5 million for anticipated recoveries from these commercial carriers for the years ended June 30, 1ga9 and 1987, respectively.
Bowever, because of the pot.ential insolvency of the carriers and certain instances in which commercial carriers have sought to impose limits or reservations on their coverage, the Univer-sity is unable to determine the eventual collectibility of these anticipated recoveries.
19 L_;m__.___.
___m_
o b
e Excess f un d g,.
The University is required by legislation to deposit funds in excess of-current requirements (excess funds) into - the State. with the State Treasurer into the University Income Fund or in certain circumstances of Illinois General Revenue Fund.
No such deposits were made for the year. ended June 30, 1988.
In November 1982 the 1,egislative Audit Commission of the State of Illinois approved the "Univer-sity Guidelines - 1982" (Guidelines) which contain criteria for computing certain excess funds.
The Guadelines were adopted by the University effective June 30, 1983.
j i
1 l
1 l
20 l
.