ML20009D854
| ML20009D854 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/08/1981 |
| From: | Spencer W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 252A, IEB-81-03, IEB-81-3, NUDOCS 8107240422 | |
| Download: ML20009D854 (2) | |
Text
.
\\
OFFICIAL COPY hh c
VIRGINI A ELECTRIC AND POWER COMP ANY, RICHMOND, VIRGINI A 23261 July 8, 1981 Mr. James P. O'Reilly, Director erial No. 252A Office of Inspection and Enforcement f d \\ cup'g 4&C/PJC:bw U.S. Nuclear RegulatoIy Commission
, p ?'
Q Region II
/.c ~
y 101 Marietta Street, Suite 3100 (S
gubg2,MgQscKe No. 50-404 p
Atlanta, Georgia 30303
$,, i - 1 u
Jo
Dear Mr. O'Reilly:
.... if$g U
h IE BULLETIN 81-03 ' % e j i, a \\y ;
NORTH ANNA POWER STATION UNIT 3 We have reviewed IE Bulletin 81-03, " Flow Blockage of Cocling Water to Safety System Components by Corbicula (Asiatic Clam) and Mytilus (Mussel)." Our response for North Anna Power Station Unit 3 is attached.
The attachment is structured according to the questioris outlined under
" Holder's of Construction Permits."
Should you require any further informatior, please contact this office.
Very truly yours, g;. m uf W. C. Spencer Vice President - Power Station Engineering and Construction Services Attachment cc: Mr. Robert L. Tedesco Division of Licensing
(/
I(
8107240422 810708 PDR ADOCK 05000404 G
PDR J
Q NORTH APNA UNIT 3 RESPONSE TO IE BULLETIN 81-Q3 HOLDERS OF CONSTRUCiION PERMITS
-1.
Mytilus cannot survive in fresh water; therefore, there are none
.present at North Anna.
Corbicula were first identified in Lake Anna in 1979. Since that I
time, the population has increased rapidly, making this presently the dominant benthic organism in terms of biomass.
At the present stage of construction, there are no structures or equipment installed which would be affected by flow blockage or degradation due to clams or shell debris. As areas of North Anna 3, which may be affected by this hazard are constructed, a periodic monitoring program (similar to the one implemented on Units 1 and 2) will be incorporated into North Anna 3 procedures to ensure inspection of piping components and various heat exchangers. Because of the early stages of construction for the North Anna 3 plant, a target date for implementation of this program cannot be determined.
2.
As indicated above, it_has been determined that Corbicula exists in the local environment, however, ;otentially affected systems have not been installed in the North Anna 3 plant, at this time.
j 3.
Since the North Anna 3 plant is in such early stages of construction, there are no systems or components installed at i
this time, which could be potentially affected by the organisms, and consequently no inspection or monitoring can take place. As previously indicated, once construction has progressed to a point I
where these organisms may affect systems or components of the North Anna 3 plant, an inspection and monitoring program similar to the one targeted for implementation on North Anna Units 1 and 2 by September 1, 1981, will also be put into effect on North Anna 3.
1 l
-. _. _. -.. _ _ _ - -. -.-. -. _.... ~, _, _ - _. ~ _. - - _ - _ _,
. -. -, -.. -.. -