ML20006E763
| ML20006E763 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 02/14/1990 |
| From: | Miller D CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9002260324 | |
| Download: ML20006E763 (2) | |
Text
-I i
i 1
J s
tf O'
ONNECTICUT YANKEE ATOMIC POWER COMPANY HADDAM NECK PLANT 5
RR41
- Box 127E
- EAST HAMPTON, CT 06424 9341 February 14,1990 i
Docket No. 50-213 j
i i
U.S. Nuclear Regulatory Commission Attn: Document ControlDesk i
Washington, D.C., 20555 l
l Gentlemen:
I Haddam Neck Plant Radioactive Effluents Pursuant Actinnt In a special re xnt of September 26,1989, xr the requirements of Technical Specification 7.1.2.2(a),
+
the Haddam b eck Plant was acknowledpec to have exceeded the quarterly beta dose limit of 10 mrad for noble gases. The following is provided as information regarding follow up actions, completed l
and pmposed, for dose minimizanon commencing with Cycle 16 Operation.
7 Cause A
The Haddam Neck Plant experienced higher than normal reactant coolant activity on entering the i
Cycle 15 refueling outage on September 2 due to debris induced cladding defects. The debris was a
< result of repairs made to the thermal shield during the Cycle 14 Refueling Outage. Degasification of the reactor coolant system resulted in above normal radioactive gas concentrations, resulting in a quarterly beta dose of 13.16 mrad, which exceed:; the quarterly limit of 10 mrad.
Com etive Action
\\
A.
The following actions to minimize future dose consequences are complete.
1.
Fuel reconstitution was completed on February 9,1990. 311 leaking pins were replaced in 92 first-burn and second-burn assemblies.
2.
Waste gas tank discharges in the Fourth Quarter of 1989 were managed to o
contribute 1.24 mrad beta dose. The cumulative beta dose for 1989 was 16.9 h
mrad, below the annual limit of 20 mrad.
1 B.
These additional actions will be implemented prior to Cycle 16 start-up.
f 1.
An augmented radiochemistry program to give advance warning of fuel defects through reactor coolant analyses will be adopted.
2.
A flush of peripheral reactor systems to ensure the removal of debris will be conductedin March 1990.
i L
l k
b MS FIEV.10-47 PNU g
r
.g;-,.
x l_o '
b The licensee contact for this Special Report is Michael D. Quinn, who can be reached at (203) 267-3583.
Very truly yours, Cononcticut Yankee Atomic Power C(wnpany
/1 D. B.' Miller, Jt
[I Station Superintendent i
DBM:BAl/ast ec:
W. T. Russell, Region I Administrator A. Wan,;, NRC Pmject Manager, Haddam Neck T. Shed osky, Senior Resident Inspector, lladdam Neck L
i 4