ML20237F728
| ML20237F728 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 08/07/1987 |
| From: | Ainger K COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 3434K, NUDOCS 8708130141 | |
| Download: ML20237F728 (3) | |
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l h Comm:nwraith Edison One First National Plaza, Chicago, Illinois
' s i /" ' Address Rrply to: Post Office Box 767 V
Chicago, Illinois 60690 - 0767 August 7, 1987 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Byron. Station Unit 2 i
Startup Test program NRC Docket No. 50-455, 50-456, & 50-457 Gentlemen:
This is to inform you of changes to the startup test program for Byron' Unit 2 in accordance with condition C(3) of Facility Operating License NPF-66.
FSAR Table 14.2-74 outlines the startup testing to be performed on effluent radiation monitors. The testing is to be performed during the 5%,
30% and 100% power plateaus. 'Ihe acceptance criteria requires the monitors to be accurate within i 20% of the analyzed sample activity.
One of the changes to the program involves test results obtained up through the 30% test plateau that were initially approved as meeting the acceptance criteria. A subsequent review showed three monitors tested at the 5% plateau were out of tolerance, however these monitors tested within tolerance at the 30% test plateau. This subsequent review also showed three other radiation monitors tested at the 30% plateau were outside the acceptance criteria in the conservative direction. Tnat is, the radiation monitors alarmed a high radiation condition even though the actual radiation i
level at the detectors was lower than the alarm setpoint of the radiation I
monitors. The test results remained approved and retesting was determined not to be necessary because the response of the monitors was in the conservative direction. Subsequent testing of the radiation monitors at the j
.100% power plateau resulted in the response of all the monitors being within i 20% of the analyzed sample activity.
The other change involves deletion of the test at the 5% power plateau. We have determined the performance of the radiation monitors is
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independent of the power level of the plant. As a result, testing will only
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be performed at the 30% and 100% power plateaus on subsequent units. We j
have reviewed Regulatory Guide 1,68 and determined that this change is consistent with the testing requirements contained in the Regulatory Guide.
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Attached is a revision to FSAR Table 14.2-74 to indicate the deletion of test requirement at the 5% power plateau.
8708130141 e70s07 DR ADOCK 05000455
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t Please direct any questions regarding this matter to this office.
Very truly yours, K. A. Ainger Nuclear Licensing Administrator Attachment cc: NRC Region III Office Byron Resident Inspector 3434K
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B/B-FSAR TABLE 14.2-74
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EFFLUENT RADIATION MONITORS (Startup Test)
Plant Condition or Prerequisites During or prior'to lower power tests and during power: escalation.-
- Test Obiective To verify prc:per operation of process and, effluent radiation monitors using radioactive samples.
Test Summary Process, effluent, and failed fuel ~monitdrr will be checked for proper response at 30% and 100% power.
Samples will l
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be verified by laboratory analysis.
'Accectance criteria The' monitors are accurate within 120% of the analyzed-sample
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activity.
Note:
Area Radiation Monitors'are-covered by a preoperational test.
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14.2-86 L