ML19340B112
| ML19340B112 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 08/15/1980 |
| From: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML19340B113 | List: |
| References | |
| IEB-80-17, LQA8000430, NUDOCS 8010210276 | |
| Download: ML19340B112 (2) | |
Text
,
bec to DAC:ADM:
CENTRAL FZLES FDR:HQ LPDR,-
COOPER N T
{
19 e
Nebraska Public Power District
"" " "dt,4 Nsic LQA8000430
[
/
August 15, 1980 c>
Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011
Subject:
IE Bulletin 80-17, Supplement 1 Dated July 18, 1980
Dear Mr. Seyfrit:
l Pursuant to the subject bulletin, the following dialogue is our response l
to Items 31 and B2.
A system which will continuously monitor water levels in all scram discharge volumes will not be installed by September 1, 1980. A pro-posal and quotation for a ultrasonic (UT) continuous water level mon-itoring system was received on August 8, 1980, from General Electric and' at best, delivery of the applicable hardware could be expected in mid-October 1980.
Installation of the UT instrumentation is scheduled to be completed in approximately.2 weeks after ceipt of the hardware.
Currently, a daily air; test is being perrormed to verify an open passage from the scram discharge volume (SDV) vent valve through the scram discharge volume (SDV) drain valve and to an atmospheric equipment drain l
sump.
Consideration is being given to other methods of testing for SDV j
which may be more definitive and reliable than the proposed UT method.
A~ second check valve (vacuum breaker) has been added in parallel with the existing vacuum breaker associated with each of the two (2) SDV vent valves as reported in our submittal dated August 13, 1980.
Other design
~
modifications which are being considered at this time are:
1.
l Installation of an independent air operated vent valve and check-
-valve (vacuum breaker) on each SDV header. This requires instal-
~
i lation of two (2) additional ven: valves and check valves at CNS.
l This item would be completed during the first available outage of j.
sufficient duration after receipt of - the required components.
f i-8'0102103
Mr. Karl V. Seyfrit Au gust 15, 1980 Page 2.
2.
Addition of a SDV instrumentation tank so each SDV header has an independent instrumentation volume tank.
3.
Removal of the existing 2" drain piping between the SDV header and the instrumentation' tank with replacement of a drain pipe of equal size to the SDV header.
4.
Direct discharge of the SDV header-through a equal size pipe to an ultimate heat sink such as the torus.
Item 2, 3, and'4 or combinations thereof could be completed during the next refueling outage subsequent to recaipt of the required components.
If there are any questions concerning the above, please contact L. C. Lessor.
. Sincerely, J. M. Pilant Director of Licensing and Quality Assurance JMP:CRN:cg cc:
U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D.C.
20555
.