ML15238A955
| ML15238A955 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/19/1988 |
| From: | Dan Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Tucker H DUKE POWER CO. |
| References | |
| NUDOCS 8803170085 | |
| Download: ML15238A955 (5) | |
See also: IR 05000269/1987040
Text
REGULA
Y INFORMATION DISTRIBUTItBSYSTEM (RIDS)
ACCESSION NBR:8803170085
DOC.DATE: 88/02/19 NOTARIZED: NO
DOCKET #
FACIL:50-269 Oconee Nuclear Station, Unit 1, Duke Power Co.
50-270 Oconee Nuclear Station, Unit 2, Duke Power Co.
0500C2Q
50-287 Oconee Nuclear Station, Unit 3, Duke Power Co.
05000287i
AUTH.NAME
AUTHOR AFFILIATION
COLLINSD.M.
Region 2, Ofc of the Director
RECIP.NAME
RECIPIENT AFFILIATION
TUCKERH.B.
Duke Power Co.
SUBJECT: Ack receipt of 880107 analytical results of spiked liquid
samples as part of NRC Confirmatory Measurements Program.
Comparison of results to known values & acceptance criteria
for comparison enc1 for info.
DISTRIBUTION CODE: IEO6D COPIES RECEIVED:LTR
ENCL
SIZE:
TITLE: Environ & Radiological (50 DKT)-Insp Rept/Notice of Violation Respons
NOTES:AEOD/Ornstein:1cy.
05000269
AEOD/Ornstein:1cy.
05000270
AEOD/Ornstein:1cy.
05000287
RECIPIENT
COPIES
RECIPIENT
COPIES
ID CODE/NAME
LTTR ENCL
ID CODE/NAME
LTTR ENCL
PD2-3 LA
1
0
PD2-3 PD
1
1
PASTIS,H
1
1
INTERNAL: ACRS
2
2
AEOD/DOA
1
1
AEOD/DSP
1
1
NMSS/LLOB
5E4
1
1
NMSS/SGOB
4E4
1
1
NRR/DLPG/PEB11B
1
1
NRR/DOEA/EAB1IE
1
1
NRR/DREP/EPBIOD
1
1
NRR/DREP/RPB10A
2
2
AS/ILRB12
1
1
OGC 15-B-18
1
1
R
FILE
02
1
1
1
1
RES/DRPS DIR
1
1
RON2
FILE
01
1
1
RGN2/DRSS/EPRPB
1
1
RON4 MURRAY,B
1
1
EXTERNAL: LPDR
1
1
NRC -PDR
1
1
1
1
NOTES:.
1
TOTAL NUMBER OF COPIES REQUIRED: LTTR
26
ENCL
25
Duke Power Company
ATTN:
Mr. H. B. Tucker, Vice President
Nuclear Production Department
422 South Church Street
Charlotte, NC
28242
Gentlemen:
SUBJECT:
DOCKET NOS. 50-269, 50-270 AND 50-287, CONFIRMATORY MEASUREMENT
RESULTS, SUPPLEMENT TO INSPECTION REPORT NOS. 50-269/87-40,
50-270/87-40, AND 50-287/87-40
As part of the NRC Confirmatory Measurements Program,
spiked liquid samples
were
sent
on
November 5,
1987,
to your Oconee facility for selected
radiochemical analyses.
We
are
in receipt of your analytical results
transmitted to us, by your letter dated January 7, 1988,
and subsequent to
verification of your values
as
per our conversation
by telephone
on
February 12, 1988, the following comparison of your results 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 your 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,
ORIGINAL SIGNED BY
DOUGLAS M. CO( I'-S
Douglas M. Collins, Chief
Radiological Protection Branch
Division of Radiation Safety
and Safeguards
Enclosures:
1. Confirmatory Measurement Comparisons
2. Criteria for Comparing Analytical
Measurements
cc w/encls:
M. S. Tuckman, Station Manager
8803170085 880219
PDR ADOCK 05000269
G
Duke Power Company
2
bcc w/encls:
NRC Resident Inspector
DRS Technical Assistant
H. Pastis, NRR
State of South Carolina
Document Control Desk
RII
RII
RII
U
WGloersen
hle
e les
2/(,7/88
?2/u/88
2
8
ci
ENCLOSURE 1
Confirmatory Measurement Comparisons of H-3,
for Oconee Nuclear Plant, November 5, 1987
Licensee
NRC
Ratio
Isotope
(UC/mi)
(uCi/mi)
Resolution
(Licensee/NRC)
Comparison
2.00 E-5
2.28 +/- 0.05 E-5
46
0.88
Agreement
1.57 E-5
1.39 +/- 0.03 E-5
46
1.13
Agreement
3.00 E-6
2.82 +/- 0.11 E-6
26
1.06
Agreement
Note:
Due to the extended decay time for the isotope Sr-89,
the analytical results were not compared.
ENCLOSURE 2
Criteria for Comparing Analytical Measurements
This enclosure provides criteria for comparing results of capability 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"'
increases, the range of acceptable differences between the NRC
and licensee values should be more restrictive.
Conversely, poorer agreement
between NRC and licensee values must be considered acceptable as the resolution
decreases.
For comparison purposes, a ratio 2 of the licensee value to the NRC value for
each individual nuclide is computed.
This ratio is then evaluated for
agreement based on the calculated resolution. The corresponding resolution and
calculated ratios which denote agreement are listed in Table 1 below.
Values
outside of the agreement ratios for a selected nuclide are considered in
disagreement.
NRC Reference Value for a Particular Nuclide
1 Resolution = Associated Uncertainty for the Value
Licensee Value
2 Comparison Ratio = NRC Reference Value
TABLE 1
Confirmatory Measurements Acceptance Criteria
Resolutions vs. Comparison Ratio
Comparison Ratio
for
Resolution
Agreement
< 4
0.4 - 2.5
4 -
7
0.5
- 2.0
8 -
15
0.6 -
1.66
16 -
0
0.75 -
1.33
51 -
200
0.80 -
1.25
>200
0.85 -
1.18