ML19211C690
| ML19211C690 | |
| Person / Time | |
|---|---|
| Issue date: | 01/16/1978 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19211C689 | List: |
| References | |
| REF-GTECI-B-66, REF-GTECI-ES, REF-GTECI-IP, TASK-B-66, TASK-OR NUDOCS 8001140226 | |
| Download: ML19211C690 (5) | |
Text
.
1-16-78
Title:
Control Room Infiltration Iteasurements, Task B-66 Lead Responsibility:
Division of Site Safety and Environmental Analysis
~
Lead Assistant Director:
R.H. Vollner, Assistant Director for Site Analysis Task flanager:
R.11. Froelich, Environmental Projects Branch 2 1.
Problem Description A key paraneter affecting control room habitability under the con-ditions described in General Design Criteria 19 and Standard Review Plan 6.4 is the magnitude of control roon air infiltration rates.
Current estimates of these rates are based on data relating to buildings that are substantially different than typical nuclear power plant con-trol room buildings.
Additional experimentally-neasured air exchange rates of operating reactor control rooms are needed to develop an im-proved data base.
This task will support the following requirements:
Criterion 19 of Appendix A to 10 CFR Part 50 (General Design Criteria for Nuclear l'awer Plants) requires that control rooms be accessable and habitable urder both normal and accident con-ditions.
Safety Standard Review Plan 6.4 Fabitability Systems and SRP 9.4.1 Control Room Area Ventilation Systems specify a review of the control room habitability systems with re-spect to the functional performance required to maintain a habitable control rot.m area in the event of postulated accidents.
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2.
Plan for Problem Resolution a.
Planned Staff Approach DSE has a technical assistance contract with the National Bureau of Standards to conduct field measurerents of control room infiltration.
DSE functions as overall test manager and arranges for control room se-lection and availability and NBS test operation.
DOR will provide con-tacts with operating plant personnel and will assist in conducting the experiments. At this time, tests have been conducted at the following control rooms:
Beaver Valley Cooper Brouns Ferry Two additional tests are planned for FY 1978 to complete the experimental measurements program.
Control rooms to be used for these tests will be selected in consultations between DOR, DSE, NBS and utility management.
b.
Description of the End Product of the Task Force (1) A NUREG report, to include the following:
(a) A description of the control room infiltration tests, detailing test procedures, techniques used, and experimental results.
(b) A tabulation of control room physical parameters (e.g.,
volume, penetrations) and measured air exchange rates.
(c)
Empirical relationships that may be used to predict infiltration rates as a function of control room physical para-meters.
(2) A staff position paper aJdendun to SRP 6.4 outlining the procedures and assumptions / criteria to be used to predict air in-filtration rates.
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flRR Technical Organizations involved a.
Accident Analysis Branch (DSE) - 3 man-nonths (1) Select candidate control rooms, contact licensees, and arrange for control room tests.
(2) Establish test procedures and test parameters (in con-sultation with EEB).
(3) Coordinate test scheduling with t'BS and licensees.
(4) Direct test operations at licensee control rooms.
(5) Evaluate test data (6) Prepare final report (fiUREG) and staff position paper (SRP 6.4).
b.
Environmental Evaluation Branch (DDR) 1 man-r.onth (1) Provide technical assistance in establishnent of test pro-cedures and test parameters.
(2) Participate in test operations at licensee control rocms.
(3) Assist DSE in evaluation of test data.
c.
Environmental Projects Branch 2 (DSE) 1 man-week (1) Provide project management 4.
Technical Assistance Requirements DSE has a technical assistance contract with the flational Bureau of Standards to conduct these measurements. As of December 31, 1977,
$44,690 had been expended.
Additional funds to be expended in FY 1978 are estimated to be $15,000.
Other than these funds, it is not expected that technical assistance fun' ding or confirmatory research funding will be required in direct support of this task.
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5.
Interactions with Outside Agencies AAB will act as the contact with applicants to arrange for control room availability, and with NBS to arrange for conductin9 the measure-ments.
6.
Assistance Requirements from Other NRC Offices No offices other than Nuclear Reactor Regulation will be involved in this task.
7.
Schedule for Problem Resolution Schedule Expected Com-(Months) pletion Date a.
Development of Task Action Plan January 1978 b.
Approval of Task Action Plan February 1978 c.
Select Control Room #1 1
February 1978
- d.
Select Control Room #2 3
April 1978
- e.
Conduct Tests at Control Room #1 April 1978 f.
Conduct Tests at Contrcl Room #2 h
May 1978 g.
Receive letter reports from NBS 2
June 1978 h.
Issue draft report for comments E
July 1978 i.
Issue NUREG report 3
October 1978 j.
Issue supplement to SRP 6.4 3
October 1978
- See item 8 " Potential Problems."
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8.
Potential Problems Selection of the r maining two control rooms and scheduling tests e
at these locations is a significant potential problen in completion of this task.
Experience has shown that ongoing plant activities (e.g.,
forced and scheduled outages, other test commitments) limit oppor-tunities for testing and can affect conduct or cenpletion of scheduled tests. These problems may affect completion of schedule items 7.c. and 7.d.
Once the control room measurements have been completed, the re-mainder of the task action plan schedule should be firm.
Tio significant problems in coordinating schedule activities with f!BS personnel are anticipated.
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