ML20066K611
| ML20066K611 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/20/1991 |
| From: | ENTERGY OPERATIONS, INC. |
| To: | |
| Shared Package | |
| ML20066K603 | List: |
| References | |
| NUDOCS 9102270294 | |
| Download: ML20066K611 (6) | |
Text
- _ _ _ _ _ _ _. _ _ _ --
ENCLOSURE PROPOSED TECHNICAL SPECIFICATION AND RESPECTIVE SAFETY ANALYSES IN THE MATTER OF AMENDING LICENSE NO.
NPF-6 ENTERGY OPERATIONS, INC.
ARKANSAS' NUCLEAR ONE, UNIT DOCKET NO. 50-368 9102270294 910220 gDR ADOCK0500gG
r PROPOSED _ CHANGli This proposed change to the ANO-2 Technical Specifications will change the Applicable Modes'(Table 3.3-6) from "ALL MODES" to "Ducing purge or when ventilating during Mode 6 Core Alter 3tions" and Modes in which the Surveillance is Required (Table 4.3-3) from "ALL MODES" to "During purge or when ventilating during Mode 6 Core Alterations" for the Purge and Exhaust Isolation Gaseous Activity Monitoring Instrumentation.
Additionally the asterisks are being repisced in the tables with note numbers.
BACKGROUND Table 3.3-6 lists the Area and Process Radiation Monitoring Instrue ntation required to be OPERABLE.
The applicable f.. odes for the Purge and Exhaust Isolation Gaseous Activity Monitoring Instrumentation is carrently listed as "ALL MODES".
Table 4.3-3 lists the Area and Process Radiation Monitoring Instrumentation Surveillance Requirements as during "ALL MODES". Asterisks are currently used to annotate notes in the tables.
'0ISCUSSION If the Purge and Exhaust Isolation Gaseous Activity Monitoring Instrumentation is declared inoperable, the ACTION refers to the ACTION of Specification 3.9.9.
The ACTION of 3.9.9 states that "With the requirements of the above specification not satisfied, suspend all operations involving movement of fuel assemblies or CEAs within the pressure vessel. The provisions of Specification 3.0.3 are not applicable." Additionally Specification 3.6.1.6 requires that the containment purge supply and exhaust valves shall be closed and handsvitch keys removed when in Modes 1, 2, 3 and 4.
The OPERABILITY of
.. the radiation monitoring channels ensures that 1) the radiation. levels are continually measured in the areas served _by the individual channels and 2) both-the alarm and automatic action are initiated when the radiation level trip setpoint is exceeded..The OPERABILITY of the Purge and Exhaust Isolation valves is to ensure radioactive material' release from a-fuel element rupture-is contained so that the offsite consequences are minimized. As'the use of this system is' restricted to Modes 5 and 6 by Specification 3.6.1.6, the requirement for applicability is ilmited to when-the Containment Purge and Exhaust System is being used for Purging of the Containment Building or when ventilating.during Mode 6 core
. alterations.
This change will eliminate challenges to the system with unnecessary surveillance activities when the system is not required to be operable. This change is effectively administrative in nature as the requirement for the OPERABILITY of the system which this instrumentation serves is required only during purging and core alterations. This change is also consistent with the Combustion Engineering Standard Technical Specifications DETERMINATION OF SIGNIFICANT HAZARDS i
An evaluation of the proposed change has been perhrmed in accordance with 10CFR50.91(a)(1) regarding no significant hazards consideration using the standards in 10LFR50.92(c). A discussion of those standards as they relate to this amendment request follows:
Criterion 1 - Does Not Involve a Significant Increase in the Probability or consequences of an Accident Previously Evaluntr<1.
4 Changing the requirement for system OPERABILITY to limit the requirement i
to only those plant conditions when the system actually has the potrntial for creating a release path does not involve an increase iti the l
probability or consequences of an accident previous'v evaluated.
The radiation levels are continually measured in the areas served by the individual channels and both the alarm and utomatic action are initiated when the radiation level trip setpoint is exceeded.
This change is effectively adninistrative in nature as the requirement for the OPERABILITY of the system which this instrumentation serves is required only during purging and core alterations and the purge valves are key I
locked closed during Modes 1, 2, 3 and 4.
Criterion 2 - Does Not Create the Possibility of a New or Different Kind of Accident from any Previously Evaluated.
This instrumentation is not involved in the creation of an ar,cident, enly in the mitigation of a previously assumed accident and would be OPERABLE for this function.
Therefore this change does not create the possibility of a new or different kt id of accident from any previously evaluated.
Criterion 3 - Does Not Involve a Significant Reduction in the Margin of Safety.
As this proposed change still requires the radiation mod torirg system to be in use and capable of. performing its function when tn= actual potential for a release exists (during Purging operations or when ventilating during core alterations) the margin of safety will not be reduced.
The Commission has provided guidance concerning the application of the standards for determining.whether a significant hazards consideration exists. The proposed amendment most closely matches example (i):
"A purely administrative change to technical specifications:
for example, a change to achieve consistency throughout the technical specifications, correction of an error, or a change in nomenclature."
Based on the above evaluation it is concluded that the proposed Technical Specification change does not constitute a significant hazards concern.
g y..
9 j
/
.J..,1 i
.- s
?4 '
g
)
'b O+
, 3
-,g k
/_[ l.' -
i t
t '>
t 1,
b s
9
-?
PRGP0 SED {,1:CHNICALSPECIFICATIONCHANGES u
s P
)
l 4 I
I-i I
I l
4
'f r
sb e
5 I i-I t e
Y d-
=
,a.
TABLE 3.3-6'
~
RADIATION MONITORING INSTRUMENTATION MINIMUM CHANNELS.
APPLICABLE' ALARM / TRIP
-MEASUREMENT INSTRUMENT OPERABLE MODES
' SETPOINT __
RANGE ACTION 1.
AREA MONITORS a.
Spent Fuel Pool Area Monitor 1
Note 1 s 1.5x10 8 R/hr 10 * - 102 R/hr 13 l
b.
Containment High Range 2
1, 2, 3 & 4 Not Applicable 1 - 10' R/hr 18 2.
PROCESS MONITORS a.
Containment i.
Gaseous Activity a) Purge & Exhaust Isolation 1
Note 2 5 2 x background 10- 10 5 cpm 16 l
b) RCS Leakage Detection 1
1, 2, 3 & 4 Not Applicable 10 - 10' cpm 14 ii. Particulate Activity a) RCS Leakage Detection 1
1, 2, 3 & 4 Not Applicable 10 - 10' com 14 b.
Control Room Ventilation Intake Duct Monitor 1
ALL MODES 5 2 x backgrcund 10 - 10' cpm 17 Note 1 - With fuel in the spent fuel pool or building Note 2_ - During purge or when ventilating during Mode 6 Core Alterations ARKANSAS - UNIT 2 3/4 3-25 Amendment No. 63
l lli l
l l
i 1
3 HE CC r
r INS 4
4 4
e a
HAE S
p p
WLR E
LI 1
D e
e NIU 5
O c
c 7
IEQ e
3 3
3 M
n n
3 S
VE t
e o
o 7
T SRR o
t L
0 3
N EU N
2 o
2 2
L t
t 6
E DS N
A s
s G
W O
a a
E E
M I
1 I
e e
R o
R l
l U
N I
N U
t t
t Q
a a
f n
E o
e R
L d
d m
A n
n 3
d E
LN a
a n
e C
EOT 3
1 N
NIS s
s s
m C. n A
A NTE e
n n
o L
ACT M
M t
M M
M o
o L
HN o
i i
Ii I
CU N
t t
I t E
F a
a a
V r
r er R
e e
l e U
o p
bt S
c o
al 3
Ta N
e e
3 O
g g
ne I
N r
r ir 4
T O
u u
o A
LI 4
p p
dc E
T ET e
L N
NA e
.t
.t d6 n
n i
B E
NR R
t R
R R
R A
M AB o
gese ve T
U HI N
nmnm od v-R CL inon ro T
A R
diii
.pM 7
S
[
l atas 2
N i tatneg I
unrnorn 3
boeoiai G
cpct r
4 N
r o
anu
/
I og grod 3
2 nenei M
L li gi pt g EK e
ot rt oan I
NC S
S t
5 S
S oaua ri N
NE o
pi pi e b t O
AH N
t t gi a M
HC l itirll C
ennnuai N
uieipct v
O y
f m
n I
t t
n onot re T
e s
i o
ttit nov A
g u
v i
n a
ef I
a n
ya i
t r ert rm n
D e
a th e
t e ao pononae A
r R
ix g
cg l t sioiiih R
A vEnanAan i i rcrarw h
i ok o k o tn ep pte l
g t&iaieai no h
g nt r o
i c
t ett et eM tsnsoio o
H AeaLcaLc V
ri y c r P
gl el e
k nura ce t
S sroSt uSt mc ioudg g
l n
R nuusC ecC e ou hd ner er e
O eopIRDiRD oD l
1il u S
uo m
T me t
R e8s3 rbp R
Ft n
I ns r
e u
r ua 2
O i
i N
i a)
)
a) l k f nundt g T
t n a
O aGa b
P a oa i oi pn T
I no t
M t
rt nhhh sei I
N eM n
n t n tt t ycr N
O p
o S
o.
nI ii2iacu U
M S
C S
Ci i
o WW1WdAD T
E i
C N
A C
E E
O S
M R
R 12 3
45 A
U A
a b
P e
b S
R ee e
ee N
T tt t
tt A
/
S oo o
oo K
M.
l IlllfIfj iifill N
NN N
NN R
I 1
A