ML20148H013
| ML20148H013 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 01/20/1988 |
| From: | Heider L YANKEE ATOMIC ELECTRIC CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| FYR-88-14, NUDOCS 8801270086 | |
| Download: ML20148H013 (1) | |
Text
Telephono (Gli) 879 8100 TWX 710 380-7619 YANKEE ATOMIC ELECTRIC COMPANY y
1671 Worcester Road, Fraraingham, Massachusetts 01701
~~_
e January 20, 1988 l
FYR 88-14 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
References:
(a) License No. DPR-3 (Docket No. 50-29)
(b) Letter, YAEC to USNRC, dated July 11, 1987 (c) Letter, YAEC to USNRC, dated December 16, 1987 Subj ect:
Schedule for Reactor Containment Building Integrated Leak Rate Test
Dear Sir:
A Reactor Containment Building integrated leak rate test (Type A test) was conducted at Yankee Nuclear Power Station (YNPS) during the Core XVIII - XIA refueling outage as described in Reference (c).
A leak was discovered at the Fuel Chute Dewatering System blank flange during the initial pressurization. The leak was estimated to exceed the allowed leakage rate and was reduced as much as possible in order to successfully complete the test.
An investigation into the cause for the blank flange leakage is described in LER-87-11 Reference (b).
It was determined that the flange had been improperly installed. The root cause has been attributed to personnel errors and the failure to properly convey design features relative to the installation to maintenance personnel performing the installation.
Yankee in accordance with YNPS Technical Specification 4.6.1.2.b, has scheduled its next Type A test for the Cycle 20-21 outage, summer 1990. This schedule is consistent with requirements in YNPS Technical Specifications and the root cause attributed to the above-described leak.
We trust that you will find this submittal satisfactory.
However, should you desire additional information, please contact us.
Very truly yours, 8801270086 880120 PDR ADOCK 05000029 YAN EE ATOMIC ELECTRIC COMPANY S
PDR L. H. Heider Vice President and Manager of Operations LHH/25.254 cc: USNRC Region I I
USNRC Resident Inspector - YNPS Oh lQ