View source for RBG-25579, Informs That Due to Delays in Quarter Scale Test Program, Hydrogen Control Owners Group Schedule for Completing Generic Activities & plant-specific Testing Delayed Until Jul 1987.Survivability Analysis Expected by Sept 1987

{{Adams
| number = ML20206C231
| issue date = 03/31/1987
| title = Informs That Due to Delays in Quarter Scale Test Program, Hydrogen Control Owners Group Schedule for Completing Generic Activities & plant-specific Testing Delayed Until Jul 1987.Survivability Analysis Expected by Sept 1987
| author name = Booker J
| author affiliation = GULF STATES UTILITIES CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000458
| license number = 
| contact person = 
| document report number = RBG-25579, NUDOCS 8704130020
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 2
}}

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l              GULF STATES                          UTILITIES COMPANY j                 P o S T O F F a c E'B O X 2 2 0 e ST. PRANCISVILLE.LOUfSIANA70775 l                                  AREACODE 504 635 3237               387'4257 l
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!                                                                                   March 31, 1987 RBC-25579 File No. G9.5 l
U.S. Nuclear Regulatory Commission Document Control Desk
!              Washington, DC 20555

==Dear Gentlemen:==

I River Bend Station - Unit 1 Docket No. 50-458 On November 14, 1985,in a letter from J. E. Booker to !!. R. Denton, Gulf States Utilities (CSU) provided a schedule for meeting the requirements of the final rule on hydrogen control as required by 10CFR50.44 (c) (3) (vii) . As stated in this letter, the River Bend Station (RBS) schedule for completion of the plant specific analysis was March 31, 1987 and impicmentation of plant modifications, if necessary, were to be completed prior to startup following the first refueling outage.
This schedule was based on the then current Hydrogen . Control . Owners Group (HCOG) schedule for completing generic activities and plant specific testing.
The RBS schedule was developed based on tasks identified in the HCOG Program Plan and utilized a detailed generic schedule developed by HCOG l               for identifying schedule milestones. This schedule was believed to be a l               realistic schedule which provided some contingency for schedule delays but was optimistic in that it was extremely sensitive to any delays in the Quarter Scale Test Program.                    Since this was a major research l              program, there were inherent uncertainties in the schedule.
l l                     Since submitting the RBS schedule in November of 1985, unavoidable delays in the Quarter Scale Test Program have occurred. Some of the more significant delays includes five additional scoping tests were required to address NRC concerns, an extended power outage occured at the test facility due to downed power lines from Hurricane Gloria, instrumentation           modifications       were    required    to ensure adequate measurement of peak gas temperatures inside the quarter radius, a thermocouple drying system was used, 13 additional Perry production tests were required and 3 additional Grand Gulf production tests were required.          In addition, a number of quarter scale test facility modifications were required to address NRC concerns, and a portion of the      delay       is     attributable      to    this. The additional testing, instrumentation modifications, and facility modifications have resulted l              in a ten to eleven month delay in the completion of the quarter scale test program.
0704130020 070331 PDR  ADOCK 05000450 P                      PDR                                                                 ll10

The current HCOG schedule for completion of all generic activities is July, 1987.       However, this schedule does not include time for NRC staff review or HCOG response to staff questions. Since initiation of some plant specific work is contingent on completion of generic activities, this also has an impact on the RBS schedule. Based on the quarter scale test and HCOG schedules, CSU expects to be able to provide our plant specific equipment survivability analysis by September,     1987.
Since the first RBS refueling outage is also scheduled for September 1987, there will be insufficient time for NRC review and approval or design and implementation of any needed plant modifications by the end of this refueling outage.
GSU therefore proposes that implementation of modifications or enhancements as determined to be necessary on a plant specific basis be delayed until startup following the second refueling outage.           This schedule is consistant with the schedule for meeting the hydrogen control rule as given in 10CFR50.44(c)(3)(vii) and is necessary due to unavoidable delays in the test program, inherent uncertainties in the schedule, and the magnitude of the hydrogen control analysis and testing program.
Sincerely,
                                                     , f.       <    &
J. E. Booker Manager-River Bend Oversight River Bend Nucicar Group
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