ML19326B475
| ML19326B475 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/22/1974 |
| From: | Phillips J ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326B472 | List: |
| References | |
| NUDOCS 8004150816 | |
| Download: ML19326B475 (2) | |
Text
a
-~
j
)
- d g
ARK ANS AS POWER & LIGHT COMPANY DTH & LOUIStANA STAEETS. LITTLE AOCK. A AK ANSAS 72203.(5011372-4311 March 22, 1974 Mr. D. F. Knuth Director of Regulatory Operations Office of Regulations United States Atomic Energy Commission Washington, D.C.
20545
Subject:
Arkansas Power 6 Light Company j
Arkansas Nuclear One-Unit 1 Docket No. 50-313 Narrow Range Reactor Coolant Pressure Transmitters
Dear Mr. Knuth:
On February 27, 1974, we reported a possible significant deficiency con-corning the narrow range reactor coolant pressure transmitters to m
Mr. M. S. Kidd, Reactor Inspector, Region II.
D)
The problem with the pressure transmitters was that their response time did not conform to the performance specifications. An investigation of the safety analysis calculations involving a pressure trip was performed by Babcock 6 Wilcox and it was determined that the increase in sensor delay time would cause a violation of a safety limit in conjunction with the startup accident. A study of the startup accident showed that the increased sensor delay time would cause the high pressure safety limit of 2750 psia to be exceeded in the event that two or more banks of con-trol rods were moved simultaneously out of the core.
As corrective action we have replaced the deficient transmitters with
+
transmitters that meet the required performance specifications.
Very truly yours, J. D. Phillips Senior Vice President cc:
Mr. Norman C. Moseley, Director Directorate of Regulatory Operations Region II United States Atomic Energy Commission
['j x
230 Peachtree Street, N. W. - Suite 818
[f
- ,3
(
Atlanta, Georgia 30303
{
- ,.,l/
t m
Q-800415eg/f
=
-nmn 1
a a
TAX PAYING. INVESTOR OWNED MEMBE A MIDDLE SOUTH UTILITIES SYSTEM
,o m
y
\\"
STATE OF ARKANSAS
)
)
SS COUNTY OF PULASKI
)
J. D. Phillips, being duly sworn, states that he is Senior Vice President of Arkansas Power G Light Company; that he is authorized on the part of said Company to sign and file with the Atomic Energy Commission this Supplementary Information; that he has read all of the statements contained in such Information, and that all such statements made and c
matters set forth therein are true and correct to the best of his know-ledge, information and belief.
D J. D. Phillips n
-. g-u a
SUBSCRIBED AND SWORN TO before me, a Notary Public in and for the County and State above named, this
- r day of Y. <-
, 1974.
/.,,_.;
f.
Notary Public My Commission Expires:
-S:,-
i, < e g>
i V
i 4-
- -,. - ~,,,
w y
--+,w m
p-