ML20234C576
| ML20234C576 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/15/1987 |
| From: | Zech G NRC OFFICE OF SPECIAL PROJECTS |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8709210341 | |
| Download: ML20234C576 (4) | |
See also: IR 05000327/1987034
Text
.
x-
-
_m:
c$eial
4
'
w
,
Q,s Ky
- s
1
g-
a
SEP 151987 -
,
,,
4
Tennessee V'lley Authority;
a
ATTNi Mr. S. A. White
Manager'of Nuclear Power
'6N 38A Lo'okout Place:
1101 Market Street:
1
Chattanooga, TN 37402-2801
1
,
Gentlemen:
SUBJECT: . CONFIRMATORY MEASUREMENT RESULTS, SUPPLEMENT TO INSPECTION
REPORT NOS. 50-327/87-34.AND 50-328/87-34
. As: part of .the' NRC ' Confirmatory Measurements Program, spiked liquid samples
l
were sent on May 11,-1987, to your Sequoyah facility for selected radiochemical
. analyses. We are,in receipt ' of your analytical results transmitted to 'us by
your letter. dated July 13, 1987, and the following compa'rison of your results-
I'
-to the known values are presented in Enclosure 1 for your information.
The
acceptance criteria for the comparisons are listed in Enclosure 2.
In our review of. these data all comparative results were in agreement. These
data should be reviewed in greater detail by cognizant staff members for any
'significant trends in the data among successive years in which samples have
'
been analyzed by.your. facility.
These results and any results from previous years pertaining to'these analyses
will be discussed at future.NRC inspections.
Sincerely,
Gary G. Zech, Assistant Director
j
for Inspection Programs
j
TVA Projects Division
Office of Special Projects
1
i
Enclosures:
j
1.
Confirmatory Measurement
{
Comparisons
i;
2.
Criteria for Comparing
Analytical Measurements
cc w/encis:
(See page 2)
'
l.
h.
l
8709210341 G70915
i
ADOCK 05000327
1
'
G
,
4
wp
L
_
. _ _ _ . __
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _
- - s a
o
m-- (, :'- t,z %,.7,j n 3
- j
g
,,i.,.
,
.+ cM
,
,
-- , p
.4
.)
- .
j_ '
-l
h'
'
>
,
L. + , ,
1 Tennessee Vall'ey! Authority -
2-
l-
-
,
ir
).
if .
'
e cc 'w/encls:
,H. L.' Abercrombie, Site Director
u
. Sequoyah Nuclear Plant-
L
.J.'A.'Kirkebo, Director,.
Nuclear Engineering-
3
. R.: L. Gridley, Director.
!-
Nuclear. Safety and Licensing-
M.'R. Harding; Site Licensing
Manager
,
,
- bec w/encis:
P
- J. N. Grace,.RII
-
J. G. Keppler, OSP
'S. D. Ebneter, OSP-
. J. A.' Zwolinski, OSP
B. . D. Liaw, L OSP
S. D.l Richardson,'OSP
c
- S. R. Connelly, DIA
.
K.-P. Barr', 0SP/RII
NRC Resident. Inspector
NRC Document Control Desk
State of Tennessee
.
't
i
4
i
-
,
RI r$
RII
RI
RII
RI
'7D
RI [
.-
'
FMfoy
b
j)
liins
JP tohr
c
KB
RMarston
,..
9/ 3 /87
9/ y-/87
9/Y'/87
9/L{/87
9//f/87
7
.
4
1
.___.-.L_.
- - - _ - _ _ _ - - _ - . - - - - - - - . _ . - - _ _
-
_ _ _ _
_
__
_ _ _ _ _ _ _ _ . . . _ _ - _ _ _ . . _ _ . - - _ _ . - -
.
n
-
o
t
t
t
t
.
s n n n n
i e e e e
r m m m m
a e e e e
p
e e e e
m r r r r
o
g
g
g
g
C A A A A
S
E
SYL
)
A
C
N
R
A
N
o/
0
ie
0 6
1
6
9
te
9 0 8 7
-
as
r
Rn 0
1
0 0
S
ec
D
i
NS
L
AE
f
L
,P
9M
8AS
r
S7
8
,9
51
5
n
Y
o.
-
eA
i.
FM
t
u 4 4
5 4
1
,N
l
4 5
3
2
3O
o
E
-
s
R
HT
e
U
N
R
S
O
L
P
O
S
N
NR
E
OA
IL
RC
PN
M
5 5 5 6
OH
-
-
-
-
CA
E
E
E
E
)
Y
TO
LU
l
4
2 7 9
m
0 0 0 0
C/
ME
Ri
NC i
i i
R
u
UR
f
7
0 4 2
8 9
3
0
E
1
1
2 2
M
Y
R
I
F
N
O
e)
5 5 5 6
C
ei
-
-
-
-
sm
E E
E
E
n/
ei
0 6
7
8
6
. 9 6
cc
1
i u
Ll
1
1
1
1
ep
9
o
5
8
0
t
5
-
9
o
3
-
-
s
- e r r
I
H
F
S
S
- _ - _ _
-
i
>
=*
..
I
.C
.,
!
,
i
ENCLOSURE 2
l
Criteria for Comparing Analytical Measurements
!
This enclosure provides criteria for comparing results of capabil-ity tests and
,.
-
verification measurements. The criteria are based on an empirical relationship
,
which combines prior experience and the accuracy needs of this program.
!
In this criteria, the judgement limits denoting agreement or disagreement
between licensee and NRC results are variable. This variability is a function
of the NRC's value relative to its associated uncertainty. As the ratio of the
NRC value to' its. associated uncertainty referred to in this program. as
" Resolution"2 increases, the range of acceptable differences between the NRC
and licensee values should be more restrictive.
Conversely, poorer agreement
I
between NRC an'd licensee values must be considered acceptable as the resolution
decreases.
For comparison purposes, a ratio cf the licensee value to the NRC value is
2
computed. This ratio is then evaluated for agreement based on the calculated
,
rerolution.
The corresponding resolution and ca'lculated ratios which denote
agreement are listed in Table 1 below. Values outside of the agreement ratios
l
i
,
are considered in disagreement.
1 Resolution =
NRC Reference Value
l
Associated Uncertainty for the Value
- Comparison Ratio '
Licensee Value__
NRC Reference Value
TABLE 1
Confirmatory Measurements Acceptance Criteria
Resolutions vs. Comparison Ratio
Comparison Ratio
for
Resolution
Agreement
I
'
< 4
.4
- 2.5
4-
7
.5
- 2.0
8-
12
.6
- 1.66
i
16 - 50
.75 - 1.33
51 - 200
.80 - 1.25
>200
.85 - 1.18
i
)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - _ - _ - _ _ -