ML20237K583
| ML20237K583 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 08/12/1987 |
| From: | Martin T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Randazza J Maine Yankee |
| References | |
| NUDOCS 8708190322 | |
| Download: ML20237K583 (2) | |
Text
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12 AUG 1987 Docket No. 50-309 Maine Yankee Atomic Power. Company i
ATTN: Mr. J. B. Randazza Vice President Nuclear Operations 83 Edisoa Drive Augusta, Maine 04336 l
Gentlemen:
Subject:
-Results of Non-Radiological Chemistry Standards Inspection Activities for All Region I Licensees Routine safety inspections were conducted by this office during the period 1985 to 1986 at USNRC Region I licensees in the area of non-radiological water chemistry laboratory operations.
The purpose of this report is to pre ent results of all licensees inspected, as well as results of measurements made by Brookhaven National Laboratory.
Each licensee is identified by a code.
Your code is 25.
No reply to this letter is required.
Sincerely, pisinal Signe y4 b
/
Thomas T. Martin, Director Division of Radiation Safety and Safeguards
Enclosure:
Combined Results of Non-radiological Standards Comparison Inspection Activities for Region I Licensees l
OFFICIAL RECORD COPY LTR RAD RESULTS - 0047.0.0 %h 06/09/87
~ 8708190322%O 0
I G
Maine Yankee Atomic 2
Power Company cc w/enel:
C. E. Monty, President C. D. Frizzle, Assistant Vice President / Manager of Operations J. H. Garrity, Plant Manager P. L. Anderson, Project Manager G. D. Whittier, Licensing Section Head J. A. Ritsber, Attorney (Ropes and Gray)
Phillip Ahrens, Esquire Public Document Room (POR)
Local Public Document Room (LPOR)
Nuclear Safety Information Center (NSIC)
NRC Resident Insnector State cf Maine bec w/ encl:
Region I Docket Room (witn concurrer.ces)
Management Assistant, ORMA (w/o encl)
DRP Section Chief M. McBride, RI, Pilgrim H. Eichenholz, SRI, Yankee P. Sears, LPM, NRR Robert J. Bores, DRSS RI:DRSS R
b RI:DRSS R
RSS K tan /gcb/mib Zibulsky P
i ak Bellamy Ma in-Jfl 87 6/lF/87 y/tf87
}/O/87 6/
87 0FFICIAL RECORD COPY LTR RAD RESULTS - 0048.0.0 06/09/87
V.S. NUCLEAR REGULATORY COMMISSION REGION I e
Combined Results of Non-Radiological Standards Comparison Inspection Activities for Region I Licensees
- Inspectors:
flarvey Zibulsky, Chenittt, Effluenti Radiation ProtectionSection,EPgR3,DRSS G. NJ -
a-James J. Koti.an, Rddiation Laboratory Specialist,
'Ef fluents Radiation
- tection Section, EP&RPB, DRSS N
d> (x cVA Approved By:
j Walter J. Pasciak.,
ChiM', Ef fluents Radiation Protection Sectic n, EP&RP3, DRSS I
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Details j
l 1.
Introduction
)
l Region I has implemented an inspection program in the area of non-radio-logical water chemistry. As part of this inspection program, licensees are required to analyze test standards prepared by Brookhaven National.
Laboratory (BNL) for NRC Region I.
The data' from the first round of this part of the inspection program are now available from all power reactors-l in Region I and are presented here.
The data as presented permits each Region I nuclear power plant chemistry j
laboratory to compare its performance with all other Region I nuclear j
power plant laboratories.
The data for the BNL kriown values are also presented so that comparison of the average from all Region I sites to the known value may be made.
The data were taken from inspection reports, but are coded here. The letter transmitting this report identified the individual code (s) for.each addressee.
Section 3.0 lists the inspection reports data were taken from.
The date are presented in Appendix 8.
2.
Data Analysis The data were analyzed as follows.
1.
The analytical data from all Region I sites were entered into a data base at BNL.
The analytical data consisted of each licensee's result for each analyte at each analyzed concentration.
2.
At each concentration a grand average and standard deviation were calculated using the data from all sites.
3.
A range consisting of the grand average pi's or minus two standard u
deviations was established. Any values outside of this range were considered outliers.
4.
A new grand average and standard deviation were calculated excluding the outliers determined in step 3.
5.
A range consisting of the grand average plus or minus two standard deviations was again established.
Any values outside this range were considered outliers.
6.
The above process was repeated until a range was obtained with no outliers.
This range was used for the data comparison.
A sample calculation is presented in Appendix A.
P 8.
It must be recognized that the data used to generate the ave-ages are not of equal weight.
For example, some laboratories were permitted to reanalyze the standards if problems could be identified and :orrected during the inspection. Also scme of the BNL standards were :11uted to
'different final concentrations by the licensees prior to ana'ysis to allow them to analyze within their calibration range.
The results were then normalized back to the orioinal dilution in order to enable :omparison In addition, all methods of analysis for a particular analyte werd grouped together.
3.
References:
Site Docket No.
Insp?ction No.
Beaver Valley #1 50-334-85-07 Beaver Valley #2 50-412 86-14 Calvert Cliffs #1 50-317 86-08 Calvert Cliffs #2 50-318 86-08 FitzPatrick 50-333 85-23 Cinna 50-244 85-14 Ct. Yankee 50-213 85-24 Hope Creek 50-354 85-59 Indian Pt. #2 50-247 86-07 Indian Pt. #3-50-286 86-04 Limerick 50-352 86-10 Maine Yankee 50-309 85-33 Millstone #1 50-245 86-04 Millstone #2 50-336 86-04 Millstone #3 50-423 86-13 Nine Mile Pt. #1 50-220 85-10 Oyster Creek 50-219 86-16 i
Peach Bottom #2 50-277 85-28 Peach Bottom #3 50-278 85-26 Pilgrim 50-293 85-23 Salem #1 50-272 86-03 Salem #2 50-311 86-03 Seabrook 50-443 86-22 Shoreham 50-322 86-11 Susquehanna #1 50-387 85-27 Susquehanna #2 50-388 85-22 Three Mile Island #1 50-289 85-17 Vermont Yankee 50-271 85-38 Yankee Atomic 50-29 85-21 J
i Appendix A Sample Calculation The chloride measurements at approximately 30 ppb were chosen for this example.
Step 1 The following data were in the BNL data base for chloride at approximately 30 ppb.
Site No.
Value (ppb) Site No.
Value-(ppb)
Site Na.
Value (ppb) 1 30.7 16 27.1 31*
26.7 2
.30 17 39.3 32*
71 3
30.2 18 28.8 33 not analyzed 4
24.3 19 28 5
30.9 20 29.3 6
30.9 21 23.3 7
32.7 2?
28.9 8
38.3 23 not analyzed S
32 24-30.7 10 34.2 25 not analyzed
-11 37 26*'
41.3 12 28.7 27 33 13 not analyzed 28 14-30.7 29 52
- normalized data
?.5
- 43.35 30 29.7 Step 2 A grand average and standard deviation were calculated for all 28 values:
Grand average = 33.6804 I xi n
Standard deviation = 9.5116
_ yg n-1 Step 3 i
From step two above, a range of 52.7036 ' 14.6572 was established.
The value l
from site 32 was determined to be an outlier.
j Step 4 A new grand average and standard deviation were calculated excluding the outlier determined in Step 3.
grand aver,29e = 32.2981 (n=27) l standard deviation - 6.1966 i
a Appendix A Sample Calculation (continued)
Step 5 From step 4 above a range of 44.6914 - 19.9048 was established.
The value l
from site 29 was determined to be an outlier.
Step 6 The above procesd was completed through seven mor.e iterations as follows:
n x
s range outlier sites 26 31.5404 4.8796 41.2996 - 21.7812 26, 15 24 30.6417 3.8514 38.3444 - 22.9390 17 23 30.2652 3.4571
$7.1794 - 23.3510 8, 21 21 30.2143 2.7358 35.G880 - 24.7406 4, 11 19 30.1684 1.9543 34.0758 - 26.2600 10 18 29.9444 1.7419 32.4283 - 26.4605 None Thus out of a total of 28 values 10 were outliers.
The range of 52.4283 -
26.4605, which contained no outliers, was used for final comparison.
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