ML17318A301
| ML17318A301 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 09/14/1979 |
| From: | Dolan J INDIANA MICHIGAN POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| AEP:NRC:00238B, AEP:NRC:238B, NUDOCS 7910040506 | |
| Download: ML17318A301 (2) | |
Text
INDIANA R MICHIGAN POWER COMPANY P. O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 September 14, 1979 AEP:NRC:00238B Donald C.
Cook Nuclear Plant Unit Nos.
1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 IE Bulletin No. 79-14, As Amended and Supplemented Mr. James G. Keppler, Regional. Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
This letter provides further update of our efforts to comply with IE Bulletin No. 79-14, as amended and supplemented
('the bulletin'.
The bulletin requires verification of conformance between the design documentation of Seismic Category I Safety-Related (SC-I) piping systems and the "as-built" condition of those systems.
Field inspection of the accessible portions of SC-I systems continues.
As of this letter, in-spection of the accessible portion of the following systems has been completed:
UNIT NO.
'afety Injection, Component Cooling Water, Essential Service Water, Chemical Volume and Control
( W895 by footage),
( ~434 by footage),and Emergency Diesel Generator Systems (fuel oil, lubricating oil and jacket water)
UNIT NO.
2 Component Cooling Water Safety Injection SEP 17 ts78 7 QXO 040 ~~
gy'.
James 6, Keppler, Regional Director AEP:NRC:002388 1
h observed a high degree of conformance between our design documentation and the "as-built" piping sys ems.
discrepancy, noted by field inspection, reviewed to date has a
an a verse on the seismic analysis.
Our inspection o
e ni f th Unit No.
2 Component Cooling Mater and Safety In-n the actual con-Jec ion ys e
t'y t ms although reveali'ng excellent agreement betwee d't' the pi'ping systems and the "as-built drawings containe
'ned in our docu-mentation
- packages, has also revealed several discrep i ion o e
ancies which we consider sufficient reason to i'nitiate inspecti'on of the remaining accessible Unit o.
systems.
0 Your staff requested from us a description of the field inspection methods being employed.
We give such description below.
Th f ld pection teams consist of a minimum of two persons.
The in-ection team takes "as-built" measurements of the piping y
e ie ins i in s stem and notes a in (s).
The location of each piping these dimensions on the field inspection dr w'( ).
h support/restraint is noted on the field inspection drawing.
-Each suppor res d
Clearances below pre-
'th th desi n hanger/restraint detail drawing to verify that the correct support/restraint has been properly installe e
determined limits between the pipe/insulation and penetrations and/or sleeves as well as t ose e ween e
h b t th pipe and abutting structures such as conduits, piping, an struc ura mern e d t t
1 embers are noted in the field inspect~on drawings.
d t are recorded and processed in accordance with app p
roved rocedures.
inspec ion a
a ns ection are conservatively The measurement tolerances utili'zed in the field in p smal er an e
o 1
th th tolerances inherent in the seismic analyses.
Thus, t e as-built" information recorded during field inspection is we 11 within the accuracy required by the seismic analysis.
To e
er mee b tt t the requirements of the bulletin, a sizable contingent sist us in the field 0
ou 1
f ts'de experi'enced persons have been contracted to as
'nspection effort and in the seismi'c review process.
The addition of these f persons to our inspec ion e
t t am should result in the expeditious completion o
the field verification and evaluation effor t.
Very truly yours, JED:em John E. Dolan Vice President cc:
R.
C. Callen V. Stello
-NRC D. 6. Eisenhut
-NRC
- 6. Charnoff R.
S.
Hunter R.
W. Jurgensen D. V. Shaller
-Bridgman