ML17326A902
| ML17326A902 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/11/1981 |
| From: | Dubry N, Jackiw I, Spessard R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML17326A903 | List: |
| References | |
| 50-316-81-09, 50-316-81-9, NUDOCS 8106300531 | |
| Download: ML17326A902 (4) | |
See also: IR 05000316/1981009
Text
U.S.
NUCLEAR REGULATORY COMMISSION
OFI ICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-316/81-09
Docket No. 50-316
License
No. DPR-74
Licensee:
American Electric Power Service Corporation
and Michigan Power
Company
2 Broadway
New York, NY
10004
Facility Name:
D; C.
Cook Nuclear Plant, Unit 2
Inspection At:
D.
C.
Cook Site, Bridgman,
MI
Inspection Conducted:
May 1-4 and 19,
1981
Inspectors:
I. N. Jac'kiw~
~~c~
Approved By:
R. L. Spes ard, Chief
Engineering Inspection Branch
>>/zr
Ins ection
Summar
Ins ection on Ma
1-4 andl9
1981
(Re ort No. 50-316/81-09)
Areas Ins ected:
Routine,
announced
inspection of the containment integrated
leak rate test.
The inspection involved a total of 29 inspector-hours
onsite
by two NRC inspectors
including'14'inspector-hours
during off-shifts.
Results:
No items of noncompliance
or deviations, were identified.
DETAILS
1.
Persons
Contacted
N
D. Shaller, Plant Manager
A. Blind, Performance
Engineering,
Supervisor
C. Litwinski, Performance
Engineer
2.
D.
C.
Cook Unit 2
Containment Inte rated Leak Rate Test
a
~
Procedure
Review
The inspector
reviewed Procedure
12
THP 4030
STP.
202,
"Con-
tainment Integrated
Leak Rate Surveillance Test,"
and verified
that the procedure
was technically adequate
and consistent with
regulatory requirements.
b.
Instrumentation
The inspector
reviewed the calibration data associated
with
performing the CILRT. All the instruments
used in the
CILRT
had been calibrated
as required.
The instrument calibration
coefficients,
RTD weighting factors,
and volume weighting
factors
were placed into the ILRT Computer Program
as required.
The following instrumentation
was used in the CILRT:
uantit
RTD's
Flowmeter
Pressure
Dewcells
46
1
6
6
During pressurization,
problems
were encountered
with the hygro-
meters.
The hygrometers
were found to be wired incorrectly to
the test points on the data logger.
This problem was
corrected,,'nd
the licensee
continued
containment pressurization.
c
~
Witness of Test
The inspector witnessed portions of the CILRT on May
1 and 3,
1981,
and noted that:
Appropriate revisions of the procedure
were in use by test
personnel.
Test, prerequisites
were met.
Proper plant systems
were in service.
- 2-
The inspector also noted that following pressurization,
the
stabilization period was begun
and the weighted average
tem-
perature in the Upper,
Lower and Ice Condenser
compartments
did not vary more than 0.1OF/hr.
over the last four (4) hour
period.
This met the stabilization criteria established
by
the licensee.
The inspector verified that the valve lineups
were conducted
and documented in accordance
with the approved test procedure.
In addition, the resident inspector verified, by direct obser-
vation, proper valve lineups in accessible
areas.
Blowdown and Containment
Ins ection
The inspector verified, that blowdown was within technical
specification radioactivity release limits, analysis
and
calculations
were completed before the release
started,
and that required environmental monitoring equipment
was
functional before the release
began.
The inspector also
conducted
an independent
post CILRT containment inspection
for equipment degradation after blowdown and did not iden-
tify any degradation.
CILRT Data Evaluation
The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> CILRT was started
on May 2,
1981.
The'nspector
~
independently
monitored
and evaluated
leak rate data to verify
the 1icensee's
calculation of the leak rate.
There
was ac-
ceptable
agreement
between the inspector's
and licensee's
leak
rate calculations
as indicated in the following summary (units
are in weight percent per day):
Measurement
'icensee
~Ins ector
Leakage rate measured
(Lam)
during CILRT
0. 05287
0.05478
0.07115
Lam at
95% confidence level
0. 05748
I
Appendix J Acceptance Criterion at
95% confj.dence level =
0.75 La = 0.75
(.25%/day)
= 0.1875%/day.
As indicated
above,
the adjusted
Iam at the
95% confidence level was less
than
the maximum allowable by 10 CFR Part 50, Appendix J.
Su
lemental Test Data Evaluation
After the satisfactory
completion of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test
on
May 3,
1981,
a
known leakage of 0.2006 weight percent per
day was induced.
The inspector independently monitored
and
evaluated
leak rate data to verify the licensee's
calcula-
,tion of the supplemental
leak rate.
There
was acceptable
agreement
between
the inspector's
and the licensee's
leak
'
3-
rate calculations
as indicated in the following summary
(units are in weight percent per day):
Measu'rement
Measured
leakage
(Lc) rate
during supplemental test
Licensee
0.2463
~Ins ector
0.2538
Induced leakage rate
(Lo) = 3 scfm (0.2006//day)
Appendix J Acceptance Criteria:
I,o + Lam - 0.25
La 4Lc g
Lo + I,am + 0.25 La.
As indicated
above,
the supplemental
test results satisfied
the requirements
of 10"CI'R Part 50,
Appendix J.
No items of noncompliance
or deviations
were identified-.
3.
Exit Interview
The inspector
met with Mr. D. Shaller on May 19,
1981,
and
sum-
marized the findings of the inspection.
4