ML20151Q631
| ML20151Q631 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 08/02/1988 |
| From: | Alexion T Office of Nuclear Reactor Regulation |
| To: | Schnell D UNION ELECTRIC CO. |
| References | |
| NUDOCS 8808110234 | |
| Download: ML20151Q631 (5) | |
Text
.
Doc'ket No. 50-483 DISTRIBUTION e
- Docket Filer GHolahan NRC & Local PDRS PKreutzer
~
PD3 r/f TAlexion i
Mr. Donald F. Schnell KPerkins OGC-1WF Vice President - Nuclear EJordan BGrimes Union Electric Company PDIII-3 Gray File ACRS(10)
Post Office Box 149 St. Louis, Missouri 63166
Dear Mr. Schnell:
SUBJECT:
REQUEST FOR INFORMATION REGARDING N0BLE GAS RADIATION MONITORS LOCATION AND TECHNICAL SPECIFICATIONS During an inspection of the Callaway Plant, the inspectors noted that some of the post-accident noble gas effluent systems and the associated technical specifications appear contrary to regulatory positions.
Enclosed is a request for information needed for the staff to complete its review. The NRC staff is willing to meet with your staff at NRC headquarters or at the Callaway site, if necessary, to discuss these matters.
It is requested that you respond within 30 days of receipt of this letter.
This request for information affects fewer than 10 respondents; therefore, OMB clearance is not required under Pub. L.96-511.
Sincerely, Thomas W. Alexion, Project Manager Project Directorate III-3 Division of Reactor Projects - III, IV, Y and Special Projects
Enclosure:
As stated cc: See next page i
l i
g 9f0' Office:
LA/PDIJI-3 P
T43-
/PDIII-3 l
g th h r T4 yh p' KPerk'ns Surname:
PJg/ /88 f / ?,/88
{/g,/88 Date:
Q' i
8808110234 880802 PDR ADOCK 05000483; P
PNU a
o sso,U u
[
^o UNITED STATES NUCLEAR REGULATORY COMMISSION
^
n
(
W ASHING TON, 0. C. 20555
(,.....,o/
August 2, 1988 Docket No. 50-483 Mr. Donald F. Schnell Vice President - Nuclear Union Electric Company Post Office Box 149 St. Louis, Missouri 63166
Dear Mr. Schnell:
SUBJECT:
REQUEST FOR INFORMATION REGARDING NOBLE GAS RADIATION MONITORS LOCATION AND TECHNICAL SPECIFICATIONS During an inspection of the Callaway Plant, the inspectors noted that some of the post-accident noble gas effluent systems and the associated technical specifications appear contrary to regulatory positions. Enclosed is a request for information needed for the staff to complete its review. The NRC staff is willing to meet with your staff at NRC headquarters or at the Callaway site, if necessary, to discuss these matters.
It is requested that you respond within 30 days of receipt of this letter.
1 This request for information affects fewer than 10 respondents; therefore, OMB clearance is not required under Pub. L.96-511.
Sincerely, j
~
t.
,'6l<-
Thomas W. Alexion, Project Manager Project Directorate III-3 Division of Reactor Projects - III, IV, Y and Special Projects l
Enclosure:
As stated l
cc: See next page I
REQUEST FOR INFORMATION CALLAWAY - POST-ACCIDENT N0BLE GAS MONITORING SYSTEM 470.1 The acceptable location for externally mounted monitors specified by NUREG-0737, Item 11.F.1 Attachment 1, Clarification (3)
"Nobic Gas Effluent Monitor," is on the main steam line upstream of the safety valves / power-operated relief valve (PORV) pathway. Callaway's post-accident noble gas effluent monitoring system, however, deviates from the NUREG document.
The monitors are located on the auxiliary building roof and oriented, shielded and collimated to detect the plume from the PORV's.
If the PORV's are blocked, the radiation monitors appear incap-able of responding to post-accident main steam releases via the safety relief valves.
Provide the following information to justify the location of the noble gas effluent monitoring system at Callaway.
1)
Demonstrate that the locations of the radiation monitors are capable of responding to post-accident main steam releases via the safety relief valves. Also, in an accident scenario, demonstrate how you plan to detect the release of rcdioactive effluents and/or the loss cf secondary system coolant due to blocked leaky PORV's. The follow-ing information, requested for clarification on page 11.F.1-3 of NUREG-0737, should be included in your description of your instrumen-tation capabilities in the accident scenario.
(a) System description, including:
(i) instrumentation to be used, including range or sensitivity, energy dependence or response, calibration frequency and technique, and vendor's model number, if applicable; (ii) monitoring locations (or points of sampling), including description of methods used to assure representative neasurements and background correction; (iii) location of instrument readout (s) and method of recording, including description of the method or procedure for transmitting or disseminating the information or data; (iv) assurance of the capability to obtain readings at least every 15 minutes during and following an accident; and, (v) the source of power to be used.
(b) Description of procedures or calculational methods to be used for converting instrument readings to release rates per unit time, based on exhaust air flow and considering radionuclide spectrum distribution as a function of time after shutdown.
i
e 4
2 470.2 Generic Letter 83 37, "PWR NUREG-0737 Technical Specifications," dated November 1, 1983, specifies that all of the licensee-identified post-accident noble gas effluent radiation monitors should be included in the accident monitoring tech-nical specifications; however, Callaway's Technical Specifications 3.3.3.6, "Accident Monitoring Instrumentation Limiting Condition for Operation," and 4.3.3.6, "Accident Monitoring Instrumentation Surveillance Requirements "
include only the plant unit-vent high-range noble-gas monitor.
Please discuss this discrepancy.
J l
t 4
)
l
~
Mr. D. F. Schnell Callaway Plant Union Electric Company Unit No. 1 cc:
Dr. J. O. Cormack Mr. Bart D. Withers CFA Inc.
Presiden; and Chief 4 Professional Dr., Suite 110 Executive Officer Gaithersburg, MD 20879 Wolf Creek Nuclear Operating Corporation Gerald Charnoff, Esq.
P. O. Box 411 Thomas A. Baxter, Esq.
Burlington, Kansas 66839 Shaw, Pittman, Potts & Trowbridge 2300 N Street, N. W.
Mr. Dan I. Bolef, President Washington, D. C.
20037 Kay Drey, Representative Board of Directors Coalition Mr. T. P. Sharkey for the Environment Supervising Engineer, St. Louis Region Site Licensing 6267 Delmar Boulevard Union Electric Company University City, Missouri 63130 Post Office Box 620 Fulton, Missouri 65251 U. S. Nuclear Regulatory Commission Resident Inspectors Office RR#1 Steedman, Missouri 65077 Mr. Alan C. Passwater, Manager Licensing and Fuels Union Electric Company Post Office Box 149 St. Louis, Missouri 63166 Manager - Electric Department Missouri Public Service Commission 301 W. High Post Office Box 360 Jefferson City, Missouri 65102 Regional Administrator U. S. NRC, Region III 799 Roosevelt Road 2
Glen Ellyn, Illinois 60137 Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P. O. Box 176 Jefferson City, Missouri 65102
-