ML20197J160

Forwards Sser Re Request to Amend License Condition 2.C(11) Deferring Const of Several Shield Walls Until Ongoing ALARA Review Dictates Need for Addl Shielding.Salp Input Encl

ML20197J160
Person / Time
Site:	Columbia
Issue date:	10/15/1984
From:	Muller D Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
References
CON-WNP-0775, CON-WNP-775 NUDOCS 8411030488
Download: ML20197J160 (9)

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CentraT Fi les Docket flo: 50-397 RAB Reading File AD/RP Reading File OCT 15 EB4 MEMORANDUM FOR: Thomas M. Novak, Assistant Director for Licensing, DL FROM: Daniel R. Muller, Assistant Director

for Radiation Protection, DSI

SUBJECT:

WNP-2 SHIELDING WALL DEFERRAL - SER SUPPLEMENT, AMENDMENT TO LICENSING CONDITION PLANT NAME: WNP-2 LICENSING STAGE: OL DOCKET NUMBER: 50-397 RESPONSIBLE BRANCH / PROJECT MANAGER: LB #2; R. Auluck, PM REQUESTED COMPLETION DATE: October 19, 1984 DESCRIPTION OF RESPONSE: SSER, License Condition Change REVIEW STATUS: Con.ple te The Radiological Assessment Branch has reviewed the licensee's August 15, September 7, and October 10, 1984 letters concerning their request to amend Licensing Condition 2.C(11), shield wall deferral. The licensee request:, further deferring construction of several shield walls at WNP-2 until ongoing ALARA reviews dictate the need for additional shielding.

Enclosed are cur SSER input and amended license conditions dealing .

with these deferred shield walls at WNP-2. The license condition states that the Licensee shall complete canstruction of the deferred shield walls and window as identified in Attachment 3, as amended by this license amend-ment and as dictated by ongoing ALARA reviews identifying the need for additional shielding.

.lThis review was performed by C. Hinson, RPS/RAB. Our SALP input is attached.

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% Daniel R. Mulict 8411030489841015)(fl Danici R. Muller, Assistant Director

%& ADOCK 05000g9 7 for Radiation Protection

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Enclosure:

I As stated I cc: R. Bernero F. Congel R. Auluck -

A. Schwencer ,) --

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i WNP-2 DEFERRED SHIELDING WALLS '

SAFETY EVALUATION INPUT-2 Prior to the issuance of the WNP-2 operating license, the licensee requested and was granted a temporary deferral of construction of several concrete block shielding walls and a leaded glass viewing window at WNP-2. The resulting license condition stated that the Licensee must complete construc-tion of all deferred shield walls and window within one year after issuance of the WNP-2 operating license, or prior to operation of the permanent solid radioactive waste solidification system at WNP-2, whichever occurs first.

The nine shield wall locations are described in Attachment 3 of the August 15, 1984 memo from the G. Sorensen, WPPSS, to A. Schwencer, NRC. The Licensee has agreed to install the shield walls described in items 1, 2, and 4 of Attachment 3 prior to the expiration of the one year period following issuance of the WNP-2 Operating License. However, the Licen:ee has requested to amend the current license condition to further defer the construction oftheremainingshieldwallsandwindow(describedinitems3,and5 through 9) until prior to operation of the permanent solid radioactive waste solidification system at WNP-2, or when an ALARA review identifies tne need for additional shielding.

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The Supply System has reviewed the requested amendment per 10 CFR 50.59 and 50-92 and has determined that no significant hazard or unreviewed safety question will result from the deferral of the subject shield walls and window. Further, this deferral will not:

1) Involve a significant increase in the probability or consequences of an accident previously evaluated; or

2) Create the possibility of a new or different kind of accident from any accident previously evaluated, or

3) Involve a significant reduction in a margin of safety. '

The bases for these statements is that the original design anticipated radiation sources in the solid radwaste system and condenser tube access areas requiring shielding for protection of personnel in adjacent areas.

Since, at present, there is no schedule for installation of the permanent solid radwaste solidification system at WNP-2, the source originally anti-cipated is non-existent.

The shield walls described in items 4 through 8 and the shield window in item 9 were all originally designed to shield portions of the permanent j radwaste solidification sytem at WNP-2. Since this system has yet to be l

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installed, the Licensee requests deferral of construction of these walls and window (with the exception of item 4, which will be installed on schedule). The Licensee will monitor radiation levels in these areas during the Power Ascension Test Programs in order to establish a base case. These areas will then be routinely monitored during comercial operation with periodic'ALARA reviews performed to ensure personnel exposures are minimized. ALARA reviews will also be initiated per approved plant procedures upon significant radiation level increases.

The Licensee has comitted to construct these deferred shield walls, whenever the dose rate at the shield wall location exceeds the radia-tion dose rate for which the area was zoned.

The two deferred shield wall locations not associated with the solid radwaste system are described in items 2 and 3 of Attachment 3. These are on the east and west ends of the condenser access areas. These walls were deferred because the Licensee's ALARA review showed that principal radiation sources are nut in line of sight with these two locations. The Licensee has been using a locked gate for each location in place of the shield wall to control entry to the high radiation zone. The Licensee has performed ALARA reviews on both of these areas during startup to evaluate the need for these shield walls. The dose-rate criteria for const,ruction of these walls is 2.5 mrem /hr at the locked gate location. Based on the results of these ALARA surveys, the Licensee has determined the need to construct the shield wall at the east end of the condenser. This wall

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will be constructed prior to the expiration of the one year period fol-lowing issuance of the WNp-2 Operating License. The Licensee will con- .

tinue to monitor the dose rates at the gate location at the west end of the condenser and will construct that shield wall if future dose rates at the gate location exceed 2.5 mrem /hr.

The Licensee has performed ALARA reviews of each of the nine temporary shielding wall deferral areas and has determined that these deferrals will have no appreciable effect on personnel exposures. The Licensee has stated that in no case following a LOCA accident will workers be required to enter areas in the vicinity of the deferred shielding to mitigate the course of the accident.

If the ongoing ALARA reviews determine that the deferred walls should be built, the block shield walls can be erected quickly, and, in all cases, will be erected for each cubicle prior to component operation. The' Licensee shall ensure that personnel doses are minimized during construc-tion of the deferred shield walls. This can be accomplished by draining /

flushing adjacent radioactive components, and using temporary shielding when necessary.

0 The staff has reviewed the Licensee's request to complete construction of the deferred shield walls and window as dictated by ongoing ALARA reviews identifying the need for additional shielding. Based on the reasons t.

described above, and on the fact that these shield wall deferrals would have no appreciable effect on personnel exposures, the staff finds the Licensee's request acceptable.

Prior to operation of the permanent radwaste solidification system at WNP-2, the Licensee ash'll construct all deferred shield walls to cubicles which will house radioactive components (this includes installation of the leaded glass viewing window).

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' WNP-2 DEFERRED SHIELDING WALLS

__ AMENDMENT TO LICENSE CONDITION 2.C(11)

License Condition 2.C(11) applies to the deferral of seven (7) block shield walls and one (1) leaded glass window in the WNP-2 radwaste building and two (2) bicck shield walls in the WNP-2 turbine building. The locations of these shielding walls are described in the August 15, 1984 letter from G. Sorensen, WPSS, to A. Schwencer, NRC. The Licensee has committed to comp,lete construction of three of these shield walls within the one year period after issuance of the WNP-2 operating license, as dictated by the original license condition. The Licensee shall complete construction of the remaining deferred shield walls and window as identified in Attachment 3, as amended by this license amendment and as dictated by ongoing ALARA reviews identifying the need for additional shielding.

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' ptANT: WNP-2 A. Functional Areas.: Licensi g Activities

1. Management involvement in assuring quality.

Response to staff questions were timely and thorough.

O Rating:2

2. Approach to resolution of technical issues from a safety standpoint.

Resolution of staff questions were viable and responsive to staff concerns.

Rating: 1

3. Responsive to NRC initiatives.

Licensee responded quickly and adequately to staff request.

Rating:1 Staffing (including management).

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4.

Not reviewed .

Rating:

N/A Y ----- - - -

' - 5. Reporting and analysis of reportable events.

. Not reviewed Rating: N/A

6. Training and qualification effectiveness.

Not reviewed Rating: N/A

7. Overall Rating for Licensing Activity Functional Area: _

B. Other Functional Areas (e.g. radiological controls, refueling) 1.

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Rating:

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2. N/A Rating:

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