View source for AECM-86-0143, Clarifies Planned Resolution of Possible Loads from Chugging Caused by Steam & Gas Venting Into Suppression Pool Through RHR Relief Valve Discharge Line.Rhr HX Vent Line Header Will Have Dedicated Discharge Line to Pool

{{Adams
| number = ML20198D502
| issue date = 05/16/1986
| title = Clarifies Planned Resolution of Possible Loads from Chugging Caused by Steam & Gas Venting Into Suppression Pool Through RHR Relief Valve Discharge Line.Rhr HX Vent Line Header Will Have Dedicated Discharge Line to Pool
| author name = Kingsley O
| author affiliation = MISSISSIPPI POWER &amp; LIGHT CO.
| addressee name = Denton H
| addressee affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| docket = 05000416, 05000417
| license number = 
| contact person = 
| document report number = AECM-86-0143, AECM-86-143, TAC-55759, TAC-57139, TAC-57140, NUDOCS 8605230306
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 2
| project = TAC:55759, TAC:57139, TAC:57140
| stage = Other
}}

=Text=
{{#Wiki_filter:--.        .
MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi EdMIMIME            P. O. B O X 164 0. J A C K S O N, MIS SIS SIP PI 39215-1640 May 16, 1986 O. D. KINGSLEY, JR.
VICE PEEllDENT NUCLE AR OPERATKp65 U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D. C.               20555 Attention: Mr. Harold R. Denton, Director

==Dear Mr. Denton:==

==SUBJECT:==
Grand Gulf Nuclear Station Units 1 & 2 Docket Nos. 50-416 and 50-417 License No. NPF-29 File: 0260/17015 Clarification of Response to Humphrey Concern on Steam Condensing Mode

==Reference:==
AECM-86/0012 dated January 28, 1986 AECM-86/0143 The purpose of this letter is to clarify Mississippi Power & Light's (MP&L) planned actions to resolve the concern of possible loads from " chugging" as a result of steam and non-condensible gases being vented to the suppression pool through the Residual Heat Removal (RHR) relief valve discharge line. This was previously discussed in the referenced correspondence.
MP&L has determined that each RHR heat exchanger vent line header should have a dedicated discharge line to the suppression pool. These lines will be sized to preclude chugging. Final engineering and design on this modification is not complete and no firm schedule has been established for implementation.
MP&L will continue to prohibit the use of the RHR steam condensing mode until the modification is fully implemented.
Should you have any further questions regarding this matter please advise.
Yours       ly, l
                                                               '     ~
l      '
ODK:bms cc:      (See Next Page)
                                              ''                                                      l 1 8605230306 PM ADOCK860516 t
05000416                                                      '
            . P       _ _ _ , _            pg    ,,     j
                                                                                                \
Member Middle South Utilities System                    ' ', U J16AECM86051202 - 1

AECM-86/0143 Page 2 cc: Mr. T. H. Cloninger Mr. R. B. McGehee Mr. N. S. Reynolds Mr. H. L. Thomas                              -
Mr. R. C. Butcher Mr. Janes M. Taylor, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta St., N. W., Suite 2900 Atlanta, Georgia 30323 4
I J16AECM86051202 - 2}}