Login

#1 ITF TC Meeting - RP Considerations

→ Europe/Zurich
2008/R-002 (CERN)

2008/R-002

CERN
Description

https://cern.zoom.us/j/7194686238?pwd=N2M3c1NvK0w5a1czWmpXU3FWdHRnUT09

Hide

# Meeting Minutes — CTF3 DBL Dismantling: Building Opening & RP Discussion

**Date:** 24 June 2026
**Subject:** Dismantling opening strategy, access control, radiological considerations
**Participants:** D. Gamba, S. Curt, J.F. Gruber, A. Gilardi, R. Corsini, W. Stopa, M. Widorski, B. Nicquevert

---

## Context

A preliminary meeting was held to discuss the practical strategy for opening the lateral shielding of Building 2001 to enable equipment extraction during the CTF3 Drive Beam LINAC dismantling campaign. A series of slides with some information 

---

## Discussion and Findings

### 1. Choice of building opening

Building 2001 has three lateral openings currently sealed with concrete shielding blocks. The discussion focused on which opening(s) to use for material extraction.

**Conclusion:** The central opening is confirmed as the most appropriate starting point, offering the best geometry for equipment extraction and logistical access. The adjacent opening could be considered at a later stage only if strictly required by the volume of material or operational constraints.

### 2. External adaptation of the opening (EN/THE)

EN/THE confirmed there are no objections to adapting the external side of the opening to facilitate equipment extraction. In particular, adding a ramp or platform extension to bridge the slight level difference between the building floor and the parking area was mentioned as a practical and feasible measure.

**Conclusion:** EN/THE to proceed with planning the removal of the shielding blocks roof as a preparatory step, in anticipation of the full opening when all other conditions (in particular the access control solution) are in place.

### 3. Radiological and access control requirements (HSE/RP, EN/AA)

HSE/RP confirmed the principle of using the opening is acceptable, subject to the condition that **the opening must be closed with a controlled-access solution before any shielding blocks are removed**. The required access system must at minimum include:

- A key-access gate or door as an immediate solution
- A SUSI-compatible access control system (or preparation for future installation) for personnel and controlled material passage

**This means the shielding blocks cannot be removed until a compliant closure solution is confirmed and installed or planned.**

EN/AA has already initiated contact with the relevant CERN infrastructure service to discuss the construction of a gate, with the following specifications:
- Maximum possible clear width and height for equipment passage
- Solid construction (climate control, weather protection)
- No bottom threshold (to allow pallet passage)
- SUSI access system installed or provision made for later installation
- Installation as soon as possible

### 4. Parking area and transport logistics

The parking area adjacent to the opening will serve as the primary staging and collection point for outgoing material. It does not require a permanent access control system, but will need to be managed during transport operations.

**Conclusion:** A simple barrier system (e.g. a removable barrier) is sufficient to reserve the parking area and control access during transport runs. No SUSI or permanent access infrastructure required here for now.

### 5. Transport routes

Routes from Building 2001 to Buildings 2002 and 2003 were briefly discussed. All proposed routes were considered feasible with no identified blocking constraints.

### 6. Temporary storage in Building 2003 (DL/CR area)

HSE/RP raised concerns about the use of the DL/CR area in Building 2003 as temporary storage for dismantled equipment. After discussion, the conclusion is that this is **acceptable in principle**, provided the following conditions are met:

- All stored equipment is clearly identified (origin, category, expected destination)
- A logbook or tracking system is maintained to ensure full traceability of any radioactive equipment
- Straightforward items such as magnets and beam structures are relatively unproblematic; instrumentation, vacuum equipment and small items require more careful handling and classification before storage

### 7. HSE/RP additional items (summary from RP colleagues)

The following items were raised by HSE/RP and are to be addressed in the course of the preparation phase:

- Access control at the tunnel when shielding blocks are being removed: gate/door with key (for material passage, openable from inside) and dosimeter reader (for controlled personnel and material access)
- Parking area barrier system to facilitate transport operations
- Investigate the possibility of installing a TREC station in the tunnel at Zone 1 or another suitable area (this requires mainly an ethernet connection and power, so to install a desktop computer and label printer)
- Define a low-level BDF (point de contrôle bas) for material exiting the tunnel
- Define a designated area for radioactive waste containers
- Define equipment priorities: what to extract first, what to store, what to classify as waste
- Circulate the CADRA document to equipment owners for waste conditioning guidance
- Plan lead contamination checks for equipment near lead bricks if those items are classified as radioactive waste
- Begin sampling for specific activity measurements

---

## Actions

| # | Action | Owner | Deadline |
|---|--------|-------|----------|
| A1 | Investigate and initiate construction of access gate at central opening (see specifications above) | EN/AA | ASAP |
| A2 | Proceed with planning for shielding block roof removal, as preparation for opening when conditions are met | EN/THE | Before campaign start |
| A3 | Address all RP items listed in Section 7 | HSE/RP | Before campaign start |
| A4 | Organise separate discussion with EN/THE on equipment handling inside the tunnel by FSU contractors | D. Gamba | July 2026 |
| A5 | Continue discussions with FCC Project Office on strategy, planning, and FSU hiring for mechanical works | D. Gamba | Ongoing |

---

## Next Steps

A follow-up meeting will be organised once EN/AA has a response from the infrastructure service regarding the gate construction timeline, as this is the critical path item before any shielding block removal can proceed.

---

*Minutes drafted by D. Gamba — please send corrections within one week.*

There are minutes attached to this event. Show them.